rear calipers

[dsmdave]

hey guy I need to rebuilt my rear brakes caliper. where can i get parts for it does suzuki dealer sell them? like piston. oilseal. etc... because of stupid me when i tooked the wheel off to change tire put it back and some how the brakes rotors push inner brakes pad out to one side and leave the inner piston contact with rotor when i take out to test ride. and damaged the piston, the rotor still looked ok. thre some scape on it. thank for any feedback. dav