Thanks so much for all the suggestions. I've never used extra wide fabric for backing, but have the opportunity to order on-line and have things shipped within the USA so thought I'd try it. It seems that I look at these on-line stores and they have such good prices, but shipping to Canada is either impossibly expensive or just downright impossible. Americans, I think your maps are blank above the 49th parallel! I've just ordered some fabric from Marshall's Dry Goods and will check out the Christian Lane link, too. When I ordered at Marshalls, there was a box to type in your postal code to calculate postage rate. To come to my house, it was $131.20, to go to my MIL in California, it was $12.90. What's with that!