I did some searching around this morning after watching your video, and I came up with this:
https://www.up.com/aboutup/special_trains/historical_equipment/index.htm
It's basically HEP for passenger trains. Scroll down the list, to Power Cars.
Mike.
My You Tube
What is this first car past the engine?
You gotta watch the video too. Fast forward to 2 min. It's the 1943 and a really cool office car at the end, on Horseshoe Curve
If I modeled modern times, I would have to have that engine. I think Trainworld might have them or is taking orders.
Henry
COB Potomac & Northern
Shenandoah Valley