I'd try Numrich Gun Parts (I think that's how it's spelled) they carry a pretty big inventory of gun parts that are out of production. Midwayusa also has a lot of stuff too, I know that they got a section of "universal gun parts" that may have a grip cap close enough to match. If all else fails if maybe you can try Remington themselves they may have old stock repair parts inventoried for warranty work. Good luck, I hope you can find one that works.