There was a reason why S&W only made 151 of the 1046's and no 4546's, a 5" barrel DAO does not make a lot of sense. Now on the mid frame it makes for a nice slick package, as mentioned there are some reasonably priced 4586's on the market right now, I would look for one of those or a 1086 to acquire. Also s&W is running down their inventory of 3rd gen parts and I doubt that they have the conversion parts left in stock but you never know.