I have a COLT Hbar that is all original. I enjoy shooting it. A while back I came home from a afternoon at the range. We had guest coming over so I had to put everything up quickly. I put the rifle behind the door to my office. Sometime during the evening the our cat found my rifle and "chewed" on the pistol grip. The scratches and grooves she left are a surprise. I now need to replace the pistol grip. Where might I buy a COLT pistol grip for this rifle? Is it a big deal to change it out? Sincerely. Brucev. P.S. For the time being, the cat is still alive.