You might be able to get through to him via the BHPC.http://www.bhpc.org.uk/chairman.aspx
Good luck with the book CK. Keep us updated as I'm sure a few of us would like to add it to the library.
That's the guy, but I have been unable to register on the site to contact him. Tried two different email addies and don't care to squander a third. If you can get on and direct him my way I would be most grateful.
My book, Fat Tire Flyer: Repack and the Birth of Mountain Biking
is at your bookseller and on Amazon