This is a very large muzzleloading smoothbore. Post 1813 Birmingham proofs on the 47" barrel. The lock assembly was missing. Inlet is for an Enfield pattern lock. Found a lock, which fit the inlet with minimal alterations to the lockplate A hammer is needed. The Enfield percussion hammer is too small. From the center of the tumbler shaft to the tip of the nipple is 2.2". Checked the usual suppliers, couldn't find one this large. I'd rather not cut and weld or scratch build a hammer. Any suggestions?