Awesome. Yes, there's a really good reference book that follows the style and features of musket/rifle design. Title escapes me right now. I'll need to go find it again.
I have the book. Something along the lines of “Gillespie Gun Makers of North Carolina”.
I just have not seen any other references to them. I’d love to find an actual rifle and give it to my dad but I have a feeling that may be impossible. Doesn’t seem like they made a lot of them and I would be shocked if any were still around.