My son and I are going to make an extended set of grips for his Bond Arms derringer. Is there someplace I can buy the grip screws and "cups" or whatever they are called for it. I've done knife handles before but I'm not sure the bolts for them would work.

Brownells. And the "cups" are called escutcheons.

That's what I thought but I wasn't sure how to spell eschutchions. I think I found an outfit that sells replacment screws and the esc things specifically for Bond Arms - just have to be careful not to make the grip any wider than the existing one. I have some Purpleheart wood languishing around that I thought would make some interesting grips. It'll be a good experience for the "Missouri Kid" to try anyway.