i have a double barrel muzzle loader shotgun from the mid to late 1800's the stock has been broken completely off...

there are no markings on the gun whatsoever except for a N and a star above it and what looks like some sort odd shaped stamp in the barrel. does anyone know where i can find another one? the shotgun can not be fired but would be a nice wall piece if complete. any help would be greatly appreciated. thank you very much
