I found one used at LGS a few weeks ago. They never have any. It shoots great. 617-2 with alloy cylinder. Does not seem to matter. Shoots great. Keep looking and one will pop up.
I dont feel sorry for you since you have the ol Diamondback to fall back on.
I love all things Colt.
The 617 does shoot really good and mine has a great trigger.
If you want one really bad, we might can work up a trade.
Ive been looking for a diamondback forever.
Good luck hunting.