That should be pretty simple, starting with one of the bargain Trappers from CDNN. I thought that the short, round barrel is what makes it a Trapper.
I'd like a 22 inch, or so .38/55 myself. 16" is just too short. They do have some .405s with 22" octagonal barrels that could be loaded down to .40/72 levels or so. Having owned one before (.45/70), that crescent buttplate scares me. My little .44 has one, but that's a whole 'nother world power-wise.
