What kind of mods are you looking for? There's a wealth of stuff out there for the 600 & 1200 Bandits, both in performance, appearance and functionality. I think you'll find most of the answers in the sections further down the board. Check them out and if there is something that's not covered, ask away, either in a related thread, or back here.
The Bandit doesn't have as many goodies as a Harley or a Gold Wing, but it is probably the best aftermarket supported sporting standard out there.