JFYI, Mike, Pietta will do small (200 guns +) runs of custom guns (provided payment up front,) to the customer's specifications (if'n you could get 199 other like minded folks you could have a custom made Pietta Stainless Walker with your preference of twist and cylinder chamber size)!
I believe this would apply to only to revolvers they currently build. I doubt they will tool up just to build 200 horse pistols as they would need all the tooling, machines patterns, codes, etc to do so. For you Pietta fans, I hope I am wrong.
Kevin