All the car/loco #s are on the box and listed on the website of the shop if looking online. Check out this PWRS page, it has the names or numbers of the coaches listed.
https://www.pwrs.ca/product_search.php?f_Scales%5B%5D=1&f_Roads%5B%5D=17&f_Manufacturers%5B%5D=224&f_ProductTypes=null&f_Keywords=coach&f_HasSound=0&f_HasDCC=0
Maybe I don't understand the question.
Brent
"All of the world's problems are the result of the difference between how we think and how the world works."
I have had pretty good luck with Walthers locomotives, finding at least text listings and often pictures. I haven't gone looking for rolling stock pictures.
I'm sure a lot of my older items like Athearn BB engines and cars did not model a particular piece of equipment, but rather a class with a road number that may not have been part of that group.
After buying a Walthers GP-9M, I researched it a bit and discovered that it was a rebuild of an older GP-9. As it happened, I was detailing such an engine at the time, so I gave it that old road number.
It takes an iron man to play with a toy iron horse.
I notice when you or i purchase a model from any company when i try to look up the car numbers or loco numbers cant find them. Even from rapido coaches pictures and numbers cant find them .Wounder why?