On Craigslist, every once in a while, Vans with lifts will be listed for sale. I Have seen a few vehicles with hand controls. I have a Friend here who has been driving them since age 19. He just had a Chevy Impala SS converted to hand controls. I'll ask him about it. I think he's done several other GM cars.
P.S. I also have a line on dirt cheap 90's Chevy V8 conversion Van with a slipping tranny that I have been resisting. LOL