Also, if you haven't gotten around to getting the Musical History Of Disneyland boxed set, it's still available. I saw it at the World Of Disney Store and the Virgin Megastore at Downtown Disney.
The Once Upon A Toy store at Downtown Disney also has the Wonderland system as well, so if you don't get a chance to pick up any in the MK, they are usually open later.
I also saw CDs by some of the other World Showcase groups in their respective pavillions, such as Mariachi Cobre has a bunch of CDs available at one of the carts in the indoor portion of the Mexico pavilion.
Lastly, although not specifically park related, if anyone hasn't gotten around to picking up any or all of the 5 (now discontinued) volumes of the Classic Disney compilation series, Virgin Megastore has TONS of them, boxed as a set, for a very reasonable price of around 30 bucks or so.
David