That's an interesting idea about the mirrors. I will give it a go....tomorrow. I now understand how to do a direct bypass using three way toggle switches (dpdt?)
I'm Canadian...living in Ontario...about 2.5 hours North-west of Toronto.

Not too many Porsche boneyards in my part of the Great White North.....one about 2 hours away. Saw one memory computer on e-bay for about $350
I still think this is insane problem to have.
Perhaps I should consider using a wiring harness from a passenger side seat.
I have not examined mine yet.
Do the seat control switches all just stop working altogether...or do they slowly begin to get a little fussy ? All of mine were working just fine until the spring cleaning began.