Disney DDR

So I want the Dance Dance Revolution Disney Mix game and it is apparently the hardest thing in the world to find. I've searched E-bay and the only ones I can find are in sets and I don't' really have $150 USD to pay for DDR games at the moment. LOL I've also only found the CD mix for sale via the internet, and not the actual game itself. I am getting quite disgruntled! If anyone can tell me where to get a copy of this hard to find game I'd love you forever and ever!!
Here's a linky to what I'm talking about:
http://www.redoctane.com/ddrremolutiondisneymix.html