>_> Guys, please don't advise him to illegally download.
Ninja - I suggest waiting a few months, whatever you decide to do. Prices will be high right now, christmas-time and all. If you know it's in the HMV JP online store, I suggest trying a different browser, or trying to contact them via email.
edit - I looked on the store for you, and I can only find the original game's OST, not the Black remake.