I was at a shop and they had a HO caboose in yellow for the Monon, it was said to be a work caboose, thought it was different, Formerly MTH.
I always liked the NYC Gondola, especially the green, I found Testor's military paint to be a close match. I did covers for the red and gray gondolas also.
A Williams GG-1 painted for the South shore, I designed the North Shore box car for a local hobby shop a few years back produced by Weaver as a custom run. I also designed the South shore Boxcar behind the EP-5.