You can easily create a sock or stocking pattern yourself. Trace the profile of the inside of the leg, and then convert the outside edge to a straight line. Or, just use the one I've made.
This works best with knit/stretchy fabrics, and a ball point needle on the sewing machine. Craft shops don't always carry a lot of knit fabric. You can use human-size socks, stockings or pantyhose for a better source of fabrics.