Does anyone have or know where I get can a floor plan of Bespin?

I would like to have a floor plan of the Carbon Freeze chamber and how it connects to the Bespin Tower...where Luke crashes through the window and how IT connects to the weather vane? I've watched ESB 100 times or more, and I am still baffled about the weather vane scene...were after Luke climbs back onto the walkway after falling out of the window...the next scene shows him walking outside...where did he fall from? Does anyone know? Does anyone have pictures or drawings?