Jeff,
For some reason I have it stuck in my mind that On Target Technologies was going to start making TCR barrels. I looked at their website and can't find where that is stated, but it seems like a few months back there was some reference to almost being done with the planning, tooling, or whatever, to make those barrels. I think their website is somewhat confusing, so you might want to give them a call. I am not sure if SSK might not be another source. Van Horn, Bulberry, Gary Reeder? I do believe there is a market though, as the TCRs are very well liked. I have a TCR 87 with a TC Custom Shop barrel in 6.5 X 55 and it will be one of the last rifles I depart with. I get holes touching with factory ammo quite often and I am not a bench rest shooter, but I sure like the results I get with that rifle. I hope you find what you'd like. I know I would sure buy another barrel for my TCR.