Try Ian again for the Tranmere Show Jenny
The lads should have his number, if not, pm me and I'll give you it.
The other option is to try the local Bike Clubs. VSOC have rallies at Clatterbridge, as do a few other Bike Clubs. Any of the lads in the Swinging Arm will be able to point you in the right direction. Also, ask Chunky as he does a lot of festivals etc with his company (I'm with the band) and he may have some contacts for you.