Another brand that makes them is MBI -- they make a nice, inexpensive product (I have a few of their 8x8's). Making Memories also makes a very nice 6x6 in lots of colors.
If you have JoAnn fabric & crafts in your area, you can try them as well. Try online for these at
www.addictedtoscrapbooking.com and
www.createforless.com. S&H is only $4.95 at ATSB, so you're not risking much....