If it'll help any, I'm going to try to pick up all the Vaughan Williams CD's I can find at the GSU library (except for his 3rd, 5th, and 8th which I own) so I can try to find the opening music. iTunes wasn't a huge help since you only get a 30 second clip... and most of the symphony movements are 12-15 minutes long (the music itself in the film lasts roughly 2 minutes).