Well how I eventually found out what it was was from watching Star Stories, the Tom Cruise episode, where there was a sketch on Eyes Wide Shut with the music playing in the background. I figured the music must then appear on the film soundtrack so I went to Amazon and listened to the tracks I thought it might be until I eventually found the right one. Then I 'googled' the title of the track and found out the rest of the information. I would have been very cheesed off if I'd never found out because it is a quality piece of music!