Gunsmith Chris Hirsch specializes in antique weapons---and particularly in S&W's (if the fact he does work for David Carroll is any indication). He has done work for me (very intricate welding, and functional finishing of the welded pieces). The result is there's no sign it was ever broken---and the gun works just fine.

Google can hook you up with him---Chris Hirsch Gunsmith.

Ralph Tremaine

"Specializes in antique weapons" means he works only on antique weapons.