I've never seen anything like this. My recommendation would be a gunsmith experienced in working with metals. If Tig welding is necessary I don't know who the best candidate would be out your way. Most of the smiths I use are more familiar with older guns from the UK. Nick Makinson gets much of my work for that. He is convenient for me in Michigan and a good guy for metal work. There are several good people on the eastern seaboard as well.