LEO's won't use Serpa's because of some ND issues that have happened. I used them for a while but stopped after learning that. I just use a properly fitted leather one now. If you want Kydex there are several makers that design specific holsters to fit properly. Can't think of one offhand since my makers now are Simply Rugged and Doc Barranti.
My last holster was a OWB from Garrett holsters, I am very impressed. these are leather lined kydex made for your gun, Turn around is about 4 weeks.
I think they are a quality holster with a good turn around time.
Worth checking out.