Update* I just won a Model 15-2 on GunChoker tonight. So adding it up, I now have a NOS narrow rib K-32 barrel, a K-22 cylinder assembly to rechamber, and a donor 38 with a narrow rib frame/barrel. Once I have it all in hand and double checked to make sure it all goes together properly, it's off to an as-yet-to-be-named gunsmith to do the deed. I would have preferred a 5 screw frame, but this is not an perfect copy nor is meant to fool anyone, so 3 screws should do it. Stay tuned for further updates!
Froggie