Here is a link to the online store for Artsi2 Quilt Boards. This is just what you are asking for, you can purchase with or without fabric. My sister and I just bought some at Quilt Shop of Deland yesterday. Check with any LQS's in your area to see if they carry them. I am using my own fabrics to make a crazy quilt type wall hanging for my son with fresh water fishing lures, large mouth bass and nature fabrics. (Harder to find a variety of gift projects for adult male children
) this is a great combination of fabric and a "picture type" art piece, and a variety of sizes! Hope this helps!
http://www.artsi2.com/page3.php