Released on June 30
BSPE-1034 | Senjou no Valkyria Piano Pieces - VGMdb (http://vgmdb.net/album/25770)

Also, anyone know where to get hard copies of it? The 2 sites I use for OSTs don't have it (Play-asia and CDJapan)

You can get it here (through a middleman):
戦場のヴァルキュリア　Piano pieces - SweepRecordSHOP (http://sweeprecord.biz/?pid=31603642)

Woah, thanks for requesting this...I didn't even know it existed! Downloading now.

Woah, thanks for requesting this...I didn't even know it existed! Downloading now.

Bump, you are downloading it from where?

I'm assuming iTunes, it's also uploaded here: Thread 92437