Nice find. FWIW, apart from the full length dome diner, the catalog illustrations look a lot like the first run of 21” ABS cars - especially the vista dome and baggage cars. Of course the reliability of Lionel catalog illustrations is suspect but I would not expect Lionel to produce entirely new moulds for these cars.
BTW, GGD has just announced a new run of aluminum Santa Fe passenger cars, the 1938-1947 Super Chief in an 8 car set. Like the Lionel cars they are said to be modeled on Budd prototypes. This is so new it’s not on the GGD website yet; I heard about it via the 3rd Rail newsletter.
Considerable price difference compared to Lionel but you get what you pay for.