I have a custom YDKJ controller I modeled after another member many moons ago with GP-Whiz internals along with (3) hand buzzers. The hand buzzers were constructed using chopper bicycle hand grips. I have used the joytokey utility to map the buttons to keys for gameplay.
I also have games 1,2,3 and The Ride for PC.
I probably have more into it than I will get out of it but thought I would post it up to see if there is any interest.