Well if you do your wn work, and can get the pins out , and maybe stone or clean up the hammer face a little you can get replacement parts here at VTI.
http://www.vtigunparts.com/
It won't hurt anything to shoot it that way as long as you still have one pin in it. The wedge is what takes the beating when firing. The hammer face probably looks worse than it is if it fires ok not much to worry about. I hope this helps you some...if not find a good Black Powder knowledgable Gunsmith.
SG