Just get a cheap bladetech and dremel it, thats what I did using the BOSS. Still have as backup holster.
I spent a lot of time filing profiling it, then the holster, then got to shooting it...
left, down and left. always, I tried and tried, gave up and sold for half price.
Wish you better luck, most importantly have fun!
While we are on holsters, has anyone just bought the inserts and made their Own race holster? I'm leaning that way now that I have a dot. I'm back in the same boat (I need a new fancy holster for the new fancy part...)