Not sure about SSR and there specifics -- I'm sure they must have them though as all the other DVC's do to my knowlege. OKW sells them at the pool bar. I'd check there first . I'm sure the price must be $11.99 as that seems to be the same at all WDW resorts, regular and DVC alike.
You may want to post this over on the DVC board, you'll have lots of SSR owners there who will be able to answer you better
