Another thought. Go to Goodwill or other thrift stores in your area and look at men's flannel shirts. A lot of them are in really good condition and you can get a lot of fabric out of the back, front (below the pockets (unless you want to use the pockets for an embellishment), and the sleeves. It's especially good when they have their "sale days.' I.e., all of their blue tags ($3.00) items are on sale for $1. Look for the XXXLs!