Does anyone know who might be making both rifled and smoothbore octagon to round barrels around 31"? I am thinking about building a half stock English rifle in .62 caliber with a hook breech, and I would like to have a 20 gauge barrel I can swap out with the rifle barrel. I know Colerain has 42" Griffin fowler barrels in rifle and smooth, but I'd rather not cut them down, and I'm not sure how the profile would suit being chopped off. Ideas?