I really like Missouri Star Quilt Co. They have 2 or 3 different widths of backing fabric. I've bought some backing fabric to use in making blocks because it is very cost effective. 108" wide is equal to about 2 1/2 yard of regular width. It usually costs about $14.95 a yard, is very good quality and they have a nice selection. If you fold and cut carefully, you get nice long strips for binding without so much piecing.