To the OP: I don't have a shield (or an AWIB holster for one), so maybe my response doesn't help you but maybe it will help someone else...
I've been experimenting with AWIB with my LC9 and M&P9c and have found the Galco sof-tuk holsters to be ok for that purpose. For 3:30-4:00 carry I prefer my Theis hybrid holster for each and I'm thinking that the hybrid concept would work well for 12-1:00 carry as well. I'm thinking about ordering an Aliengear $35 dealio and trimming it down to a single clip. It would probably be cheaper (and easier) than trying to learn holstermaking on my own, and it would probably be less expensive than ordering a 'dedicated' AWIB holster from any of the aforementioned holster makers.
I do like my remora for my LC9, but it shifts around too much for me to fulfill its billing as a real-deal 'clipless IWB'. It's great for pocket carry or for a quick shove in the waistband of gym shorts for a trip to the corner store or something, but not an all-day carry IWB (FOR ME).