Based on NanaSews' information, I found it online at Joanne's:
http://www.joann.com/keepsake-calico.../14055602.html
(And those Keepsake Calicos are on sale for 50% off!)
Edit: I just saw that there is limited quantity and that you might get more than one cut of the fabric to total your yardage, also that there is a minimum purchase of 3 yards. If you really want the fabric, might be a good idea to order right away before it sells out.