Mulebrain you could try the approach I took.
I bought a used Hawken several years ago. It looked like this when I got it:
It had a real bad gap between the bolster & tang and in the lockplate area. I fixed the tang by heating & welding and then made another hammer from scratch.
It looks like this now:
I still have to do some reshaping the wood lockplate area at the top rear yet.
I also made another lockplate to imitate the Jim Bridger Hawken by lengthening it and reshaping the tail. It took a while to do but it can be done.
After a little backyard cooking, I mean hardening, in charcoal it looks like this now:
later, Mike