Yes Volks, the UP was acquiring new, from the builder, passenger cars that late in the game. So was ATSF with the second batch of Hi-Levels. There were also, get this, RPO cars from Budd for the UP.
Notably absent, from those orders, though, were any Sleeping and Dining cars.
However, the final order for LD equipment was that made by the KCS. Ironic how they had just been delivered as KCS decided to pull the plug when the Post Office Department (USPS not around until, like Amtrak, '71) decided no further need to handle First Class Mail by rail.
The timing of KCS decision caused TRAINS to have the "Jinx of Jinxes". I was "in the 'Nam" that October '67 (about 260 DTG) when first, my TRAINS showed up with a cover proclaiming "KCS; we have no intention of getting out of the passenger business...". Funny how, after getting off duty one evening, I went to the Tan Son Nhut Base Library got out the two day old Journal, and there was a "What's News" item on the front page saying KCS was going to do just that.
Ouch for TRAINS; even though DPM had been foreseeing "The End".