I do not know of anyone now. The set I had was made by Vickers. The lug on hem was seialized to a set of Damascus barrels. And they were not mono blocked.

How much heat did it take to get te locking lug freed from the tubes? I have yet been able to get a locking lug freed. Everything else comes apart fine.

The ribs are soft soldered to the tubes, but the tubes are silver soldered to the locking lug lump first, and in the unfinished condition. That takes a lot of heat, and I daresay it would be near impossible to save the tubes after that much heat to get them apart. (but why would you even be taking it apart if you wanted to use those tubes?)

Edgar, mine are already apart. I want them made into a barrel set. The tubes are ruined and yards away from the lugs and ribs. "Apart" Now I want "Put Together". Anyone know who is willing to do this? I know there are people who can do it, because new shotguns are made by the hundreds every day.

Hambrusch, in Austria, used to be quite reasonable. I had a set of double rifles barrels made by them a l...o...n...g time ago, and if I recall, they were under $2000. The logistics are beyond my patience level now. The rifle was pre-1898(winkwink), so I just mailed it to them, and 8 months later it was back, finished and regulated. They do chopper lump and mono block, but as you've got the lug lump, half their job is already done.
The gunsmith who worked for our mutual friend knew everyone at Hambrusch, so I had him "translate" for me. I believe he worked for them before coming here.