These 4 tracks were released as downloadable extras with the 1st volume of the Halo 4 OST:

Armour
To Galaxy (Extended)
Foreshadow
Desecration


I've already tracked down volume 2, so I know that the first 3 are on it, but according to Halopedia, they're modified. I would be very grateful for any help finding these songs.

Here you go Desecration
https://www.dropbox.com/s/rd7ahadyuc4cght/16%20Desecration.mp3?dl=0

Thank you, cooljacker!