>> Do any of these actually exist anymore?
Yes, I have one, and they are not that hard to get - anyone actually using one for games soon develops sore knee joints

I'm not interested in the Atari version, what I want is a/the Amiga version! I say 'the', because the RJ Mical program, the inspiration for the Guru Meditation numbers during the original Amiga development, has apparently been lost. So if I ever get 'free' time, I may have to write a replacement (fat chance).