Might be worth talking to Steve at Showtime in Bristol - I know he had a lot of it kicking around at one point, but don't know if he still has it. Showtime's number is 01179405225.
To buy the stuff new costs a bomb, try ringin round where they are doin the road works on the big roads i.e BNRR as they have the ofcuts and un wanted bits lyin round and it will cost ya next to nout.