Amazon, Zentangle, Soft Expressions and Blick Art Materials sell Zentagle tiles. Zentangle provides the largest selection and resources. They email a newsletter with new methods once or twice a month.
Zentangle offers information on how use the tiles and how they were created. Zentangle also lists a directory of certified Zentangle teachers by location. Contact information for each teacher is provided. As of 2015, Amazon is the only one to offer free shipping, with orders over $35 shipped free.
Blick, Soft Expressions and Zentangle have staff with knowledge of their art products to answer specific concerns. Amazon does not specialize in art products, and their customer service does not know the specifics of the tiles.