I know it's less than a month till the DVD comes out, but I managed to find a video of Ophelia's Song as it's performed in the movie, minus the intro, but including the Aya solo. I quite like it! It doesn't sound too out of place as a graduation song, and I could believe
Here's an MP3 download for anyone who wants it, until a better version becomes available. I cut out the audio from the trailer.