Wow, I just read through this entire thread and can't believe that Nick Makinson out of Komoka ON (just outside London) hasn't even been mentioned once!!! This guy trained in England and could build you a custom made sxs shotgun or double rifle from scratch. It is March 1, 2017 and I just visited him yesterday to have a shotgun fitting. The only bad thing is that now I know that all of my shotguns are too short for me!! His work is jaw dropping...That's all I can say. I could never afford a custom made shotgun, don't get me wrong, but he can do any gunsmithing work you need. Also, he's 75 now so not making anything from scratch anymore anyway. Just stock work and repairs, etc. Google Nick Makinson and you'll find him.