Ahahahahahahahahaha!
Hoo boy...
Sorry, I had a similar problem trying to fit my pistol (G21sf w/GTL10 Taclight) into a "real" holster. The problem is that it is the infamous "Short Frame" model with a picatinny rail. That makes it about impossible, apparently. I found a nylon one that sort of fits the bill (universal), but I'm looking for something better.
Anyhoo, Blade-Tech may be able to help you, as might Raven, but I got the best "Can-do" from Mernickle Leather. They assured me that no custom was too big or problematic.
Other private makers may be able to do the same...
Good luck and keep us posted! I for one will be interested.