I'm an engineer, we do a lot of CAD work, have a great big plotter and scanner.
For beans, I'd scan the factory manual 2002 or 3.0CS wiring diagram and plot 30" x 42" or any smaller size you'd like, complete with wiring codes and part identifications.
Let's say I'd do it for five bucks a pop, you pay for mailing in a tube (less if you want it folded up). How simple can I make it?
Like the ebay item said, these would make a great wall poster. You frame it, if you want, or just thumbtack it up.
Anyone interested? I'm gonna make one for myself, both 2002 and my 3.0CS.