Where did the NOS music go?

Talking of the Nine o'clock service, I've always wondered where all the music disappeared to. I know that on the day everything kicked off with Chris, all the tapes in the (locked) music storage had been removed.

They must be sitting in someone's studio - I wondered whether anyone would put them on kazaa or something like that. I'm sure there is an emotional rawness for the person who has got them, and maybe they destroyed them - but it would be very good to have them back and available for wider appreciation.