Unfortunately I have never seen and cannot find any information about mini-freezers. However, many mini-fridges do have a small freezer space that should be large enough to keep some F/T food for your snake.
You should be able to find these at your local appliance store. Sears seems to have a good selection, Wal-Mart even sells a few that have freezer space.
Edit*
Hmm, that 5.5 Cubic foot freezer is a nice little unit. You'd have enough space in there for some F/T and then some for yourself too! Good find JLC