If you have time to get there, New Braunfels has a great LQS,
the Quilt Haus which has a large selection of fabric. There is also a smaller, quaint store called Oak Leaf Quilts. New Braunfels is a great town with many things to see and do. You could go to Gruene for great antiques and food (the Grist Mill) and a famous dance hall (Gruene Hall). With this hot weather we are having, you would find it a great place for water activities: tubing or Schlitterbaun (not sure I spelled that right) which is a huge water park.
This area (New Braunfels, San Antonio and the surrounding area) is my stomping ground, so feel free to contact me if you have any questions and I'll try to help. Have a great visit. Sorry about the heat and the awful drought we are having.