At one time, I had a large (@80 sq. ft.) HO scale model railroad of the C&I. It was donated to a model railroaders' club when a move became imminent. I painted and decalled the locomotives and all but two of the cabooses myself (the two being Bowser models, one in the old tuscan paint scheme and one in the later yellow and black).
Jordan is 10 or 11 years old in this photo... he was born in 1990, so you can calculate how old he is now.
I found an O scale model of C&I 20 on eBay a while back; it ran under my tree last Christmas. Here's a pic: