SAS 1111 E Indian School Rd, Phoenix, AZ 85014 is absolutely amazing. It is not just a fabric shop. It has all sorts of sewing stuff. There are a huge amount of fat folds at $3.99. Some is big box store fabric and much quilt shop fabric--just older stuff. It is really fun to browse around at all the stuff there.
There are lots of others but selling at the usual high prices.