A A500 floppy drive will physically work with any amiga, BUT you won`t be able to fit a fascia so it will look awful. I understand your problem as I`m trying to get a replacment drive for my A4000 as well. There are also a few adapters on the market that will let you use a standard PC High Density drive but I have no experience with these so I can`t really comment. Bye bye
