approximately 10 years ago I visited the Allied Model Trains store in Los Angeles. There was a set of UP yellow passenger cars (aluminum) one of which had Wabash set in red letters near the car entrance door. At the time i was not in the o scale 3-r hobby and did not note the name of the manufacturer.
I am now into o scale (Wabash & Ill. Central) and would be interested if anyone can identify the manufacturer and how I might be able to find the UP (Wabash ) sleepercar.