This is what I am talking about, though it appears theforce.net was never able to pick up a copy and review them.

Star Wars Technical Journal of the Planet Tatooine
Star Wars Technical Journal of the Imperial Forces
Star Wars Technical Journal of the Rebel Forces

and I remember reading the answer section of a Star Wars Insider that mentioned the Incredible Cross-Sections showed the spot where the toilet was located on the Falcon, though I don't have that one.

Star Wars Incredible Cross Sections