A/C Compressor problems

[guse1096]

After driving with the A/C on for a couple hours I turned it off and found the compressor clutch to still be slightly grabbing. It would make a rubbing/grinding noise as it was obviously slipping and not suppose to be on. After checking the air gap I found the .021 feeler guage to fit between (min. air gap). After the car cooled down and sat over night now it works fine. So I guess Im just looking for suggestions and where to look for replacement clutch parts if I decide to tear this down and find something faulty...