The best I could get was this link
Which will take you to a page where you can here the song (all of it, although it does sound slightly like a 20 second clip played repeatedly) streamed from the site.
Also if you search on Limewire for 'Chin Chin' a few people have it, although I have yet to be able to download it from them. (It was on AudioGalaxy, fat lot of good that does).
Now all I need is a song called 'siren' by 'ether' and I will have the complete actual soundtrack instead of the fake they sell in shops.