Michaels Crfat supply stores used to have an entire section dedicated to Wilton and other products. The last time I saw them they had numerous cake pans, candy molds and many other supplies. Jo Ann Fabrics stores may also have extensive decorating supplies. There are still others who may only carry the pans and molds such as kitchen supply shops. Various items are also available online through Amazon.
These are the places I was thinking of, Michael's, Wilton (online also). Be sure to get a coupon for items you will purchase before going into the store, they usually say they don't have any to give out. Can print one out online or use your i-phone.