Yeah, you won't find mass-manufacturer holster makers supporting that light/laser, for three reasons: it's a SIG proprietary product, and has changed design a couple times (this in particular really burns holster makers because they have a hard time supporting every possible combination), it isn't widely used by LEOs, and it has protruding control buttons on the sides, making it harder to design a holster that won't accidentally turn the laser on.
What I would do is find a leather holster maker who makes a nice thumb-break holster (with the special one direction snaps), and is also willing to do something semi-custom. Chances are there's someone near you, and they can use your gun and light to mold the leather to fit.
