I have the Blade Talon located here:
http://www.topgunsupply.com/blade-tech-double-magazine-carrier-xd-45.html
Its adjustable and it holds my XDm-40 mags just fine. After putting in my XD-9SC mags with the extender the extender fits fine so long as they face opposite directions with the bulky part of the extender facing away from the other mag. Now the 9mm mags are "slightly" narrower than my XDm-40 mags (in depth, and such a small amount that you can't tell just by looking at them), but the thing also has a single screw that allows you to control the tension. So I'm sure XD45 mags would be fine (besides, the one I linked to states its for the XD45). It also has the 3 screws in the back so that you can change out the way it attaches to your person (for example mine came with the "Tek-Lok" attachment from blade tech, but i switched it to the blackhawk paddle attachment just to see if it would work and it worked perfectly) if you don't like the original attachment style or you want to control the angle they're at.
My only issue is that I have a hard enough time just concealing my gun given my body size and clothes, so currently I'm unable to reasonibly conceal any spare mags w/o just putting them into a pocket. But that isn't an issue with the mag pouch, it's with my current wardrobe.