I found a few signed books at Coles Books in the UK that are sold out elsewhere (hardback/paperback, signature in book or bookplate). Postage is steep for International but reasonable if you buy a few books. Eg:
Where’s My Guitar? Bernie Marsden
Tales of Boomtown Glory Bob Geldof
Snakes! Guillotines! Electric Chairs! Dennis Dunaway
Wham! George & Me Andrew Ridgeley
Boys Keep Swinging Jake Shears
All My Yesterdays Steve Howe
Home page Coles Books (coles-books.co.uk)