The "bimbo" comment was referred to by Pamela in her 2nd book "Take Another Little Piece Of My Heart". She was doing a radio interview at the time in Miami promoting "I'm With The Band" and Jimmy was in town with The Firm at the same time.
The DJ asked her "So what do you think about Jimmy Page calling you a bimbo?" The DJ played her an interview he had done with Jimmy a few hours earlier. The DJ asked him what he thought of her book and his reply was, "Oh I've met alot of bimbos out there. You know how girls like to exaggerate".