I was looking at these a month or so ago... Great concept, but I didn't see a price on them, and quite honestly, figured it would be outa my price range. I went with a standard Blackhawk version that cost around $50...
I would guess that the Safariland version EPD mentioned is the 6004, but it's not an either/or option, you can get it to hold a pistol with mounted light, or you can get it to hold one without. Price is around $70.00 per holster. I had one, and it was great as far as retention went, and it is a level II holster, but not having the option of using my USP without UTL mounted was an eventual PITA.
FYI, the Blackhawk "with/without light mount" holster that I had for my USP45 STUNK. It didn't hold the pistol well at all.
Good luck with your new product.