No and no. The mounting brackets and space allotted for the seats are completely different, and the exhaust on the C is totally different than the Classic.
Well, yes, it's almost 20 years old, it never did have a lot of accessory options to begin with. You can do a few mods to them, but other than that you have to love them for what they are. Lots of guys buy these for a great price and have visions of "updating" them to a Classic. But they're completely different bikes in almost every way, and very few if any parts are interchangeable.This bike is difficult to find accessories for.