If anyone outside Danbury is looking to buy individual thesis binders, I've found a rare resource. Mayapple Press offers individual thesis binders in the 1", 1.5" and 2" variety directly from their website: www.mayapplepress.com
They're difficult to find and I believe the WCSU bookstore will only ship groups of six. Mayapple will send them individually from their location in Bay City, Mich. Link to the binders is on the left under "manuscript binders."
I've seen them and they appear to be identical to what others have used to file their works.
Best - Fletch