Holsters for the 645
Everybody (Bianchi, Galco, Sparks, Minute Man) used make them, but not anymore with the hooked trigger guard; I find them on ebay every once in a while: They may or may not fit in something made for CZ 75 or Beretta 92, or for the Colt Double Eagle (Bianchi used to make theirs to fit 4506,1006, and the Colt DE; There has been a lefty Avenger on Gunbroker for a while, I think) much more likely to find them molded for the round style guard.
Might try the custom guys; I have a Milt Sparks Roadrunner, Alessi DOJ, and an El Paso Saddlery Street Combat and have considered a Bulman leather. The ones I've found are pricey ($75 or so, so far) But there was a brown Sparks on Ebay as recently as two weeks ago, and a black one a couple of weeks before that (I won that one), but I hadn't seen another for almost a year.
Good luck, but I think the Custom option might not be so bad; Sparks or Bulman might do it for around the price of a new Concealeable. Bianchi Pinch is still around and fairly inexpensive; not exactly what I would like, but better than nothing and open topped.
Cheers, TF