Springs Creative in Rock Hill SC supplies a lot (if not all) of Walmart fabrics and they are the company providing the precuts called Creative Cuts. You can read more about it here and even become their friend on facebook. They were at the York Co. Quilt Show and I asked why they don't have an outlet store since they actually bolt up the fabric in Rock Hill to ship out to the Walmarts. They said they don't sell directly to the public.
http://www.springscreative.com/news/...n-on-facebook/