This is a long shot "in search of". My kids are participating in the Future City competition and the final part of the process is building a model. They really want a monorail, but the model has a $100 limit (set by Future City), so I am hoping to find it used and discarded. The ones on Ebay are pretty high priced, so I am putting feelers out.

Walt Disney World Resort Monorail Play Set | Play Sets & More | Disney Store

A link to the Future City competition. National Engineers Week Future City Competition™