Well, a CD32 Pad should work, as you can use it as
a Digital Joystick also anyways

The directions are like the directions of a digital stick, and the red button is like the fire button...
Only the ones which need adapters (Sega, 4-Player,...) will need
a Classic Amiga. And well, it would be possible that someone writes Drivers to support those on Catweasel too I guess...
Steffen