Wagner buffet floor plans

Can any of you direct me to floor plans or other visual material involving Wagner buffet cars?

NYC&HRRR did operate Wagner buffet and sleeping cars but the cars were owned by Wagner, not by the railroad, and were not carried on the railroad roster of rolling stock. Wagner was sold to Pullman shortly after the death of Webster Wagner in a train wreck. More than likely, if any Wagner records survive they are wherever the Pullman records are currently held.