@goodhead - thanks for looking. I actually have a few spiral tribe flyers. I was on a mailing list of theirs and they occasionally sent out flyers for some events they were planning.
I had one arrive on a Wednesday once for a party in Rotterdam old library (they may have been squatting). Me and three mates booked the ferry and drove all the way there. Found the place and partied all night. Drove back Sunday for the overnight ferry and was in work lunchtime Monday.
Christ knows what was going through our minds!!
There are two cassettes on my mixcloud that we bought from them over there. They are pretty heavy though, be warned. I love the one with the MC, I think it is the melt down Mickey one.