9 Movie Trailer Song?

I saw the trailer for the movie 9 and I really enjoyed the song they chose for the trailer. I would like to get the song in mp3 format so I can listen to it on my iPod, where can I buy it from?
Is there an online store with the song?

The 9 Movie Trailer song is played by Coheed & Cambria and the song is called "Welcome Home".

You can get it on itunes.
Besides the electronic song, there is an instrumental cover version too.

Witch one is the electronic one?
I need to know what the electronic song is...