Larry,
The 1949 Budd 10-6 Sleeper is the one coming in the set:
Here's the floor plan for the Pullman 10-6:
Is it possible to find out how many RRs bought the 4140-A cars? If so, maybe there will a future train offered that includes the Pullman sleeper and SAL and RF&P can be done like the PRR and RF&P coach is being done in this current SAL 6-car set
Everything I have indicates that SAL/SCL/Amtrak, and RF&P were the only RRs that had the 4140A plan cars.
The SAL cars passed on to SCL, then Amtrak, could have been altered so much that the interiors were totally different.