Avery binder spine labels can be purchased online at a number of different locations. The most efficient way to get these binder spine labels is to purchase them through the company website, but they are also offered at a number of retail locations that will allow purchase online.
In addition to being available through Avery's website, users can also get these spine labels at office supply stores like Office Depot as of May 2015. CNet has a listing for the labels that points users to a number of different websites as well as the usual price of the labels on those websites. Amazon.com also has a listing for a variety of these labels.