Buell rotors
item #'s
390187478532 or 300418745082
they are the new style with 9 floating bushings
the older style had 6 bushings and didn't last very well,
mine came apart just like this one looks like it will be soon
item # 390184357715
or you can try Craigslist in your area, many people parting out tuber buells
as far as the shaking, make sure that your rotor and pads are clean, no glazing from overheating, and disc not warped. you may also check your steering head bearings as they can and will cause the same feeling when they are bad.