I host the 6" fabric square swaps with different themes. The current one is posted
http://www.quiltingboard.com/member-...p-t224956.html if you are interested. I have accumulated a TON of I-Spy fabs from my swap. 1/2 yard of fabric, cut 12 squares and that's it. Also I have seen a lot on Ebay for sale. I also watch the clearance section and the "mistake" cut section for squares.