I forgot to post this pic from earlier.
As far as concealability goes, I'm a fairly large guy (larger love handles than in this pic) and no one has spotted me carrying yet. I usually wear a sig-tac vest and tuck my shirt in. It hides it easily. I have worn a loose button-down shirt and as long as I avoid bending at the waist to pick something up (bend at the knees,) it won't print.
in summary: I haven't seen a need to find a more concealable holster. When I absolutely can't hide the .45, I throw my snubby in my pocket.