Thanks for the pointers.
It seems that the 3" barrel is a problem for the Model 60 Pro. But, the barrel was one of the reasons I bought it! It looks like I'll have to go the custom route, for a paddle holster.
I've found out that I would like to try a Galco Paddle Lite for my Commander! Optic Planets has it on their site, but it seems that it's not in stock. A few other places are out of stock. I did find one on EBay.