I'd contact the fellow at Fagan's Forge in Connecticut. He's a blacksmith who, I believe, takes on custom work. I've purchased a number of items from him, like strap hinges, thumblatch sets, etc., and the service has always been great and the stuff very well made. He's online at
http://www.fagansforge.com, and his number is (860) 928 4020. Good luck.
Dave in Padanram