Entry #44 (Winter) Super Mario Galaxy "Freezeflame Galaxy *Ice*"

 This track comes from the 2007 Wii title Super Mario Galaxy. This is half of the Freezeflame Galaxy, the other half being molten-hot. 

Developer: Nintendo EAD

Composer: Koji Kondo 

The soundtrack is available here.

Entry #35 (Nintendo Launches) Super Mario 64 "Bob-omb Battlefield"

 This track comes from another N64 launch title that has been featured before, Super Mario 64. It's a weird, quirky track that is classic Mario and makes you want to dance.
Developer: Nintendo EAD
Composer: Koji Kondo
The soundtrack is available here

Entry #20 (Tranquil Tracks) Super Mario 64 "Dire, Dire Docks"

 This next track comes from the classic Nintendo 64 title Super Mario 64. Following in the Tranquil Tracks theme, nothing about this particular track is very demanding- it's just chill enough to be enjoyed in quiet time.
Developer: Nintendo
Composer: Koji Kondo
The simplest way to get a physical soundtrack would be through Amazon. Check out your prospects here