call this guy: Larry the barrel man Phone # (740)-498-9380 lives around the Port Washington, Ohio Area- he is at many gun shows- If he doesn't have it, It can't be found !!! This guy has , literally, thousand of shotgun barrels!!! 'Rude Dog.
i have a 181/2 inch mossberg cylinder bore - for 2-3/4 or 3" shells - has a couple of smudges that could easily be fixed with a bottle of birchwood casey bluing - i just never cared what it looked like (was only meant for one thing) - $50.00 firm - pm if intrested.