Obviously it has some value for at the very least, parts.

You may also try a guy up in Canada. Precision Gunsmithing was the name in Ontario. A UK transplant. I spoke to him and bought a gun from him. We discussed sleeving a damascus gun at the time. His price was very reasonable. He may be able to save the gun and do it for something in less than $2k, maybe quite a bit. Also, since only one tube let go, it's possible to have one tube sleeved, maybe saving 25-33%. Another smith that seems to be able do some great saves for less than first thought who's name keeps coming up in these situations is Keith Kearcher
http://members.toast.net/keithkearcher/

My point is; don't give up on it until you get at least one quote, preferably two.