Brainwavz Headphone Hangers: Hengja for $12, Truss for $13

In addition to the earpads a couple of Brainwavz headphone hangers are on sale. Their Hengja goes for $12 each, while the Truss (you can hang two of them) goes for $13.

Or if you want to optimize for a lower price, there is a variety of alternatives at Amazon.