The Recaro seats in my Porsche were the most comfortable car seats I ever experienced. They sell aftermarket kits for all kinds of cars, you might want to check into them. They are German made as well. I've actually given some thought to doing that myself. Porsche installed the Ergomed model stock in all 944s and 928s, there is another called Orthoped that I am thinking of plugging into my 280 SL to help my tired old fat ass. If you google "RECARO" you'll get their homesite and a bunch of dealers. A lot of speedshops carry them and will special order them for you. I bet they bolt right in, seeing how SLs would have been one of their target markets back in Germany.