If you want a quality piece, contact Colin Stoltzer at Stoltzer and Sons Gunsmithing. He does beautiful work, he studied under Steve Zihn, and his prices are reasonable. http://stolzergunsmithing.webs.com/
He is located at Washington, Kansas.
Notice the .50 Boxlock, it is historically accurate, and will be of the finest workmanship. Call Colin and visit with him he is a really nice guy, tell him Bill told you to call.