A facsimile of CNJ's 62' Pressed Steel coaches can be created from Walthers #9172/3 sides if you have the patience to shorten them and plate over the windows on the shortened ends to the vestibule , the head-end cars are way easier to render. Ed Bommer would know the best way to do these, as he did a beautiful post-war "Queen of the Valley" some time ago.
I'm sure there are easier ways to "get there" depending on how close you want to get that prototype too.... Congrats, excellent looking locomotive. Love the CNJ.