Try Larry Racine at http://www.lprgunsmith.com/index.asp. He gunsmiths for the Palma team and was a good buddy of Creighton Audette. He certainly goes back to the days when pre64s were favored over the course rifles and maybe even to the end of the 1903 period. Never can tell what he might have laying about in his shop. And he knows everyone in the big bore community.