[ithacaartist]

I think a tinted epoxy would probably work out best. Mohawk Chemicals makes a variety kit of powdered tinting pigments. It will take a little patience to experimenting to get a good match. Then build up the material again, work down to proper shape, and blend in the checkered pattern. I wouldn't shoot with them.

You may remember the Red Swiss grips I made a while ago by modifying and re-checkering a cast urethane pair which were originally molded from a pair of those extra-thick and extra-coarse grips Mauser applied to a lot of the 70s' production of Swiss frame guns. I sent a sampling of pics of Red Swiss grips to the grip casting company, and I was impressed how close they came in matching the color.