The E2 will fit into the Mini-Mag AA holster with a little effort. The clip of the E2 needs to go on the outside of the holster though because the E2 is slightly wider than the AA Mini-Mag. Just direct the clip over the outside of the pouch and then slide in the E2 and it will fit like a charm.
Also, just enough room is provided on the bottom of the pouch to prevent the light from activating from pressure on the tailcap, much like the actual SureFire pouches. This of course occurs because of the slightly shorter length of the E2 as compared to the Mini-Mag.
Bucky