Hey Lee
To be honest I don't know if he created/did this song... my idea was, if you got the DVD of the film you could listen to it on there, record from it. I haven't found the song/track anywhere, but that doesn't mean it didn't exist and that you didn't hear it lol
As for buying it, well I've been looking for it, but so far I've only found another film called "Swimming", but that came out in 2000, and is not the one you're after. It's a full length film. Your film is only approx 15 minutes long.
I'll keep looking, but the obvious places don't have it, like Amazon or Play.com.
I did find it listed on one film website, filmprices.com I think it was, but that particular film (typically) wasn't for sale.
As I said, I'll keep looking.
Best of luck.
http://filmprices.com/uk/person/andrew_litvin.html