There are some guys on the 1911 forums using Sentinel magazines, which are much closer to flush:
http://forums.1911forum.com/showthread.php?t=392423
Apparently it just requires a little filing to the toe of the base plate, but at $37 a piece from Wilson Combat I'm hoping Checkmate may have some. I just got mine back from Para. If it does fine at the range, I may give Checkmate a call.