Gilbert made MoPac stock cars in red and in maroon. Some were painted, some were unpainted plastic. Some were open slat sides, some were closed slat.
Gilbert also made UP stock cars in yellow/silver and the NP Pig Palace in red/silver.
Lionel has subsequently made S gauge AF stock cars in CP Rail, red/white; UP, red/silver; GN, blue; REA, green/red and AFL, blue/yellow. A horse car, 41010, was made in green. There may be more new road names in recent catalogs.
