I've had several pairs and the only place I've been able to find them is at the Hammes bookstore. In the past you have to get them early because once the students arrive the popular sizes are history. Just curious, did you call the bookstore or just check the catalog? I've never seen them advertised in the catalog so if you have not called I'd give that a shot. They also show up occasionally on Ebay but the sizes offered can be pretty extreme.
