Look for books, pics, specs, model info, etc.
The American Railroad Passenger Car John H. White,Jr. Vol 1 and2 The Johns Hopkins University Press 1978 701 West 40th St Balt. Md 21211 Third Printing 1988 IDanz91278@AOL.com
I assume you are thinking about Pullmans available for private charter. The Pullman Company issued a brochure regarding cars available for private parties. It had floor p[lans, decriptions, etc. IIRC, Wayner Publications reprinted this probably 20+ yrs ago.
Hope this helps
work safe
My advice would be to try to find two older Kalmbach books by Arthur D Dubin:
Some Classic Trains and More Classic Trains. Check your public library.
Dave Nelson