Here's a heavy frame Vaquero 45 Colt/45 ACP convertible that I bought new a few months ago from a dealer that was going out of business. The gun was made in 2002 and is a Davidson's Special Edition. Being a retired gunsmith, I just had to do some enhancements. For openers, I reamed the cylinder throats to .4525" and chamfered the forcing cone to 11 degrees. I modified the pawl for free spin, did a trigger job, adjusted the cylinder for perfect alignment, and made an extended hammer plunger to prevent a cylinder turn line. It's a great shooter but now I need to do something with that shiny front sight.
The reason I am looking for a .357/9mm convertible is that I have the Ruger P95DPR. I'd like to standardize on the 9mm for "cheap" range work, and do the .357 for walking through the backwoods of the Ozarks while hunting, speacial occasions.