Update: Should anyone else have this question, I've found one that works perfectly
The Condor Tornado Tactical Leg Holster
http://www.airsoftoutletnw.com/index...olster-OD.html
Its adjustable in multiple places, including the bottom to accommodate the barrel. Very secure fit, and it could probably even be better if I spent a little more time adjusting some of the parts. Haven't had it out to play just yet, but it sure feels like neither the holster or the AEP are going anywhere.