part number 91-10WB-123W. It was up above, but probably easy to miss.
EDIT: Also, it's not in their catalog that I know of... I'm not sure. I think I had to request the part number for what I needed over the telephone. You can punch in the part # and buy it over the web page anyway though. From what I hear, they have lots of things that have part numbers but aren't in the catalog, like coin doors that come fitted with token mechs instead of quarter mechs.