I also recommend blade-tech or comp-tac.

I just went to the Blade-Tech web site. On the left side "catagories" drop box click on OWB belt holsters, Then double click on belt holsters w/tek-lok. Go down to the "weapon" drop box. It allows you to choose the make and model of your gun. The 627 (up to 5") is listed. You might want to check back with blade-tech and ask why they told you it is not available.

I would also think that a kydex holster made for a standard model 27 would work. I'm certainly no expert, but I don't believe the cylinder of the 627 has a larger diameter than the standard model 27.