Porsche list:
not 356, 911, 912, 914, 924, 928, 944, 930, 968 etc nor any Porsche race car ever. P'che has always bought German produced mirrors, mirrors produced specifically for Porsche & not for another auto-manufacturer.
Very very expensive, with or without electrics. Very high quality, fit, finish, chrome or painted, never "all black" (except on a black car

)
1 basic style of mirror could fit different P'che models in different era; the mounting bracket (foot) was specific for each P'che model.
The mirrors must be mounted 101% accurately or the outer top & bottom corners will be tilted too far up or too far down, looking stupid in both cases & causing the front door quarter-window frame or the windshield-frame to blocked the mirror.
On 912/911 they were never mounted "directly across from each other"; the passenger side mirror was always mounted further back on the door. If this was not done properly, someone was in a lot of trouble. Expensive repairs, welding, sanding, filling, painting, swearing cursing were justified. I know !
For many many years there was no Porsche option for electric mirrors; nor for central locking for that matter.
There was, however & still is, an option list that (usually) increases the new price of a new Porsche by 25 to 40%. Ouch !
Everything you
have to have on your new Porsche costs money, a lot of money ..... I was "unhappy that a 2d mirror"; electric or not, cost as much as a used VW Polo.
Little know fact: I can not tell you why...but when I was buying every nice 911/930 Porsche I could find in Euro & sending them to USA I was often able to buy "factory registered cars"...that were (I assume) registered for 1 second & derigistered ... making them "used cars" & allowing Porsche to sell them at a price that made me

Porsche mirrors are currently produced by a German company that is owned by Magna of Canada .. (who seems to own many companies including Steyer AT I believe) ....
I don't know why, but each division of this mirror-factory is sealed like a bank vault.
....for example....no one (except, I assume, upper-management) from the BMW mirror division can enter the Mercedes mirror division; no one from another division can enter the Porsche mirror division etc.
This factory attempted...some yrs ago...to move a % of production to E. Euro. They built a factory; trained managers, engineers, workers from E. Euro by bringing them to the main factory, north of Stuttgart, for an extended period of time.
Many hotels were filled, for many months....very good for the local economy....
After production was started in E. Euro, many persons from the main factory North of Stuttgart had to visit the E. Euro factory...often & for many months per visit per visitor.
A senior manager told me...
"we had to build each mirror at least 2x !
We were going to lose our entire German based work-force because no one wanted to go to E Euro, even at double pay, for 1/2 of each year....including me !
The E. Euro's didn't want us there either, so there was some "friction'...
.. in the end we had "only-trouble".
I asked "
so what happened?". He didn't look happy when he told me "10 years ago I had hair, now I have none & what hair I have left has turned white; we built this brand new factory in this town, the factory that you are now looking at (no, I could not go inside to look) to do the production that could not be done in E. Euro ...no matter how hard we tried to do it there.
We built this new factory next to our other brand new factory, because Magna gave us the budget to do it. Then we took many E. Europeans from our factory in E. Euro & moved them here, forever... which is why this
little farmer town in the hills has grown 500% in the last years; everyone was building new houses, supermarkets, pubs, schools...even a new Church !
Now everyone prays together, regardless of religion, that the German Auto industry stay strong so we can pay for all these new buildings.
I asked "
what about the E. Euro factory, what do they build there now?. He replied
"mirrors for E. Euro produced cars &, please, ... no more questions,....,I have already told you too much. Drink your beer & tell me about your latest adventures" .
This I did not do; instead we kicked a soccer ball around, being careful to not spill our beer

1 happy persons in this town was the owner of a wood- floor factory; his firm also grew by 500%, very quickly. He was very concerned that 1 day no more buildings would be built in that area & he would have to close his wooden-floor factory. This proved to be true.
That factory, with the same ownership, now manufactures electronic systems ... for "applications" that he will not talk about. His factory is sealed too !