I've been looking for a 16 ga SxS to use as a dedicated dove gun. I'd like the chokes M/M. Most of the guns I'm looking at are M/F or F/F. I know I could buy a new gun and get an extra M tube, but I want an old gun. My questions are 1) about how much would this cost, and 2) any recommendations on a good smith to do it? I'm in Atlanta, but don't mind traveling.