B.S.
Joanne's does have great custom fabric and if you catch it at the right time it goes on for 50% off. The one with the best selection (imo) is at Preston & Forest.
Cutting Corners on Midway (in the area another mama referred to) is good and you could try Boca Bargoons on 75 and (I think)Spring Creek - it's on the west side. They have lots of Robert Allen fabric.
have fun!