My sister has discovered this site, and it might work for you. You have to give them your email address before you can see the prices of the fabric, but we have both done that and there hasn't even been one email or ad from them. (I was expecting lots of stuff. Glad I was wrong. Quite often I regret "joining.")
I believe they sell only by the bolt. I haven't bought anything yet, but my sister and I are going to split a bolt or two when we decide what we want. A lot of the fabric is $3. or $4. a yard...
http://fabric4less.com/
Dina