I'm still around...I haven't checked this post in a while, and other hobbies (hot rods, even more expensive than guns) have taken up most of my spare time. Still active in shooting, but not the 625-5. I never did find another barrel, although I still see the 625 Classic for sale now and then. Mine has just been sitting in the safe unused for some time now.
I still intend to have this re-done though. If I decide to invest the money in it, a custom gunsmith (Bowen perhaps) should be able to replicate the original, even down to the DX style interchangeable front sight. The only thing that may not be duplicated is the original laser engraving on the barrel.