[Richard]

I am in the middle of a similar issue with a recaro seat. I give you the punch line first. I ended up buying air paddle switches on ebay that the car lowering crowd uses. They are larger than the isri switch that you pictured but it could be made to work.

Google isri 6800 workshop and you'll find a manual. A couple of posters on POG said they got the parts from Prevost at around 100 bucks per switch. Ouch.

Obtaining parts from recaro has been a goose chase. They don't sell to the public. The distributors they use in the states don't sell easily to john public, so I had to set up an an account only to learn the switch was overpriced, hence my route with the aftermarket paddle switch.

In my case with the recaro, it has a truly over complicated system for a air suspension seat and I am bypassing the complication and simply manually inflating the air suspension. The over complication is that recaro uses a electronic mechanism to monitor seat height and automatically adjust air in or out or the bag to compensate. It also provides electronic adjustment to the rebound shock on the air seat mechanism. Talk about the German overengineered solution to a problem. After getting the paddle switches I did find some NOS parts on fleabay for some of the mechanisms. I bought them because they were cheap and I wanted to see how it was supposed to work.