Old flour sacks work well and you can often find them at flea markets or antique shows. Flour sack towels are available, but I don't think they are as heavy as the originals. Also, I was able to get some money bags from my bank years ago. They make excellent bags for camp gear and I made some small bags to keep my green coffee beans, yellow peas, and parched corn in. My current haversack is made from a linen lab cover that I got from a friend who worked at the VA research hospital in Chicago.