As for this tune, it must be available!. I have a sneaky feeling it
could be on one of those Cult Fiction discs, which also features the
Grange Hill theme amongst stuff like Kojac etc. Have a look in the
exotica sections in your record shop, well, I think they still put that
stuff in that area, its where I got my Sound Spectrum and Blow Up stuff
from.
Good luck, and if you find it, let me know!
Cheers,
J