i can demux the 5.1 audio from the MKV file i got here from rutracker and dropbox / upload it to you DJ but FYI if your at rutracker it's listed under

Le Grand bleu / The Big Blue (edited version)

and the Bill Conti score track is audio track 4 (the first two being Russain dubs and track 3 being a hybrid of US cut with Eric Serra score)

additionally, i do have the US laserdisc of the US cut as well (NTSC) with the original Stereo soundtrack

http://www.lddb.com/laserdisc/00652/31026/Big-Blue-The-(1988)

I am a massive fan of this film and have multiple DVD and Blu-ray editions of this as well as Laserdiscs, posters and the soundtracks (both Serra and Conti) so if anyone needs anything, give me a shout. I would love to see a 1080p custom Blu-ray of this to complete my collection