Arrgh... that is truly horrible, man. I'm glad you're OK, though. That is more important than a busted gun. I've got one of these...they're nor super-rare, but they are unusual...1550 made.

One alternative would be to find a .44Mag 5" full-lug barrel and have it re-bored. I imagine there's a lot more of those floating around than the .45's. Also, you might try checking with some of the shops that specialize in IDPA work. The 5" .45ACP gun was popular in IDPA until a rule change made it illegal. A number of folks had their 5" tubes replaced or whacked to 4" to make them legal. With an ACP barrel, it should be the same except for the longer forcing cone which could be simply shortened.

I wish you the best of luck in getting your revolver restored,