Here you go, I just ripped the audio from the trailer and upped it to RS
Go to youtube, http://www.youtube.com/watch?v=W0EBYlXFSvU
Copy the URL into http://www.savetube.com/
Hit Go, hit download
This will save it to your desired location in an .flv format.
Use whatever program you want to delete the video and just save it as an .mp3.
I use http://mediacoder.sourceforge.net/
If you decide to use it, don't be put off by the vast number of options. The only thing you need to do is add the file to the queue. Then hit the video tab at the bottom and unclick 'enable video'. Then click the audio tab and choose what bitrate you want. Then click start at the top and 15 secs later you will have your .mp3