I googled toweling and got a good hit on
http://www.fabricdepot.com/solids-basics?cat=69 but I think it's a little pricey, but then, I'm cheap. Another key word search could be "ticking".
Hemming a kitchen towel was the first 4-H project that I did. (Back then, the towel and a gingham apron were what you sewed your first year.