Check out this design.
http://www.antiqueguns.com/auction/item.cgi?jimfrancis/jimfrancis-50
It would seem to lend itself to using a modern 10 gauge single shot and a Dixe Gun Works boxlock pocket pistol as a starting point, with an old musket butt (from some Bubba'd stock).
http://www.antiqueguns.com/auction/item.cgi?jimfrancis/jimfrancis-50
It would seem to lend itself to using a modern 10 gauge single shot and a Dixe Gun Works boxlock pocket pistol as a starting point, with an old musket butt (from some Bubba'd stock).