It seems to be OOS at gamestop.com, but it looks like it still exists in many physical Gamestop stores. Since they never restocked the game in their online store, it is very likely that you will find the game with the soundtrack in the physical store. (However, it is also very likely it will be gutted as well, so YMMV!) You can see if a store near you has it here:
It is also in stock on Amazon, but it is unlikely it will come with the soundtrack, since they had reordered the game:
The reviews are still favorable:
The CD that comes with the game actually contains piano arrangements of some of the game's music, not music pulled straight from the game. Amazon doesn't seem to make this too clear, so I though I would mention it for those who care.
01 - RADIANT HISTORIA
02 - Mechanical Kingdom
03 - Where the Wind and Feathers Return
04 - Blue Radiance
05 - -HISTORIA-
Total Time: 20'46"
Edited by Nitemare25, 20 March 2011 - 10:32 PM.