Quite a few. A lot asked to remain anonymous but I have spoken to Steve Green, a lovely bloke who used to do fanzine reviews in The Dark Side, Tris Thompson, Harvey Fenton, Craig Leadbetter among many others. I'm still hoping to speak to Stephen Thrower and would love to track down John Martin but I have not located contact information for either.
This will be part of the first chapter of my PhD but will be published sometime in the next two years, I hope. I have a few chapters coming out next year, one will be on Fantom Kiler.