Tell your friends, neighbors, and family members that you would welcome good used cotton clothing for quilting. People often have clothing that is too big/small, or maybe has a tear and the rest is good. Men's shirts and ladies large shirts, full skirts, etc. have quite a bit of fabric in them. If someone you know has a garage sale tell them you would be interested in any cotton clothing that does not sell when the sale is over. Often they will give it to you rather than send it to the landfill or haul it to a thrift store.