Tip from the Hasbro reps at C4:
These WILL be available through Disney's toll free # for orders, and if you place an order and want a complete set of all five, you should tell them that you want an UNOPENED case of the Cantina figures. There's two of each of the 5 different figures in each case (you'll need to find a friend in need too if you just want one set). They said if you simply order a set of 5 Band Members, odds are you won't get one of each, since the Disney folks packing the stuff up won't know the difference between the (instruments of the) various Band Members, once they're all opened up.
I don't recall the price right now either though.