When Bill Taylor started his repair service for the switches, there were no reproductions available. That is no longer the case
I know Wilkinson has them along with the Capri specialist teamblitz. I imagine the other vendors have their sources and there is a German seller on eBay, $265 delivered.
The German seller has sold over 50 so there must be a bunch of old ones sitting around. Hopefully you can flush some of them off of garage shelves.
Larry