Berry Patch in FW on Hulen is wonderful. Then there's Cabbage Rose on Vickory blvd. Lone Star quilts in Arlington, just to name a few. I suggest google quilt stores in DFW and find more. YOu can also buy a book at a LQS with all the stores in each state.
http://www.sewfunpatterns.com/texasquiltshops.html
This is one I foudn googling. Have fun.