On a whim, I bought a Decocker SP-01 from a local store for $459, brand new (they had 2 of them), I am still waiting for my DA/SA manual safety SP-01 from Angus. I bought the decocker for a handgun class I was taking.
Anyways, I found that a Fobus kydex holster for a Glock 21 fits just about perfect. I've been using it for weeks and it only cost me $19. I plan to get a Blade-tech sometime in the future for my manual safety SP-01, and I plan to sell the SP-01 decocker.
So, if you just need a holster to get by, a Fobus Glock 21 works just about perfect. It's so cheap that it's almost disposable.