I'm doing the same research online. It seems there aren't as many now as before, and I've read complaints about some of those! One that seems to be a good bet is a place called Redmans, in Washington state. I'm waiting for my C96 to show up. Its 7.63 and the ad said the bore was "worn".......probably like a shotgun. If so, I'll get it relined, same caliber as I already have a Czech CZ75 and a 1916 Luger. I also read an old post, and saw some pics of a weapon "re-barreled" by someone in California who used to cut off the barrel and weld on a new one........in the pics you couldn't tell.