I think this is the amazon listing you are looking for:
http://www.amazon.com/gp/product/B00A8E4I42
I mistakenly bought one of these confusing it with a next-gen Alfa AP-51. Since I couldn't find a manual for it, or figure out how to make it use my ALFA adapter by itself, I had been using a Raspberry Pi to bridge the two.
The model number is AP121U; If it really is possible to turn it into a wifi-pineapple somehow then maybe it wasn't a bad buy after all.