GunParts/Numrich had grips a couple of years ago. I also see them on ebay fairly regularly. This website has a list of Combat Master-compatible parts; most or all can be bought through Brownells. I've got about 1000 rounds through my CM, and the only parts that concern me, as to their durability, are the recoil spring guid rod and plug. Unfortunately, those are the only parts on the gun that are not readily available! Just about everything else is either the same as a corresponding 1911 part, or can be readily modified to fit.