@thehostrussia posted this morning that they had located the score for ‘The Host’ online. We have contacted Open Road Films about whether this is the official score or not. We will let you know as soon as they get back to us. In the mean time, you can listen to what has been posted on soundcloud here or below on the youtube video.
Update 2/6/2013: The Host Russia had to take down their YouTube link for the score due to Open Road Films asking them to. The SoundCloud link has also been removed. If you heard any of it, yes, it was indeed from the real score from The Host. –Sarah