As of 2015, the Mary Maxim craft catalog does not sell Gallery Glass supplies. Gallery Glass is a paint which can be applied to windows to mimic the appearance of stained glass; Mary Maxim specializes in needlework and other fiber-based crafts.
Mary Maxim sells yarn, patterns for knitting, crocheting, loom work, sewing, jewelry-making and paint-by-numbers. While Mary Maxim does not stock Gallery Glass paint, it can be purchased elsewhere. The web site for Plaid Products, the company which makes Gallery Glass, has a list of catalog companies, stores, and online retailers that stock the product. Hobby Lobby, Joanne's Fabrics and Crafts, and Michael's are popular distributors with online and in-store stock.