What a neat, neat little gun Don, thanks for sending pics. It uses the roll of caps like a cap-gun, like the Herkimer rifle of same era. The "Maynard tape primer"... Very, very neat little revolver, the guys are going to like this one.
I added some pics of an original so the guys are going to be able to see what you need and what it looks like. I'd think they need to be made from scratch?