Tengen Toppa Gurren Lagann Edition of the Sorairo Days Album (not the 2nd movie song)

I’m looking for this particular album single. I’ve searched for it but I haven’t been able to find it anywhere.
It’s Nakagawa Shouko’s "Sorairo Days" single except this is the ‘Tengen Toppa Gurren Lagann Edition’ which doesn’t have the same tracks as the regular single.

Here is the track list (in English, of course):

1. Sorairo Days
2. happily ever after
3. Sorairo Days -of construction-
4. Sorairo Days -of realization-

Source: Sorairo Days – Jpop Stop! (http://wiki.jpopstop.com/wiki/Sorairo_Days)

If anyone has this album, I’d be eternally grateful and would gladly pierce the heavens with my drill in your name!