If I remember correctly,and its the KLF vs ENT single that you are referring
to,then it was only released in a limited number of one sided black 7".I
recall that the deal was that you sent £2 mail order,and if you were too
late to get a copy,then you got a melon instead.Whether anyone actually got
a melon remains a mystery to me..but I DID get the single.
Also,around the same time,there were a couple of T-shirts released ("Who
killed the Jamms 120BPM"   and the "Shag Shag Shag" logo) intended to raise
funds towards the cost of making the White Room film.After a lengthy wait,I
got the t-shirts with a note off Bill saying "Paul,As we have been such lazy
bastards please find your T-shirts enclosed PLUS your cheque" I was well
impressed! I have other letters somewhere answering relevant questions of
the time,regarding limited (or non-existent) releases in the late 80s.I
shall dig them out as they might answer a few questions posted on this list
recently