The only blue one I saw in a 2007 thread was actually made from a 3D printer. This guy was way ahead of the flock. These are really just becoming popular now.
The one in the downloads section is has purple stripes but is otherwise white. It also has "DISNEY MONORAIL SYSTEM" written on the side. This is a very simple model, I don't think it was finished but all that was available is there, including a page with some tickets etc. It it was made, I think the options would become self evident. It would be a great template to improve upon. It's the only one I know of.