N&W also bought several 0-8-0s from C&O. Lionel made 0-8-0s with TMCC in C&O livery back in the mid 2000s. I have one and am considering changing to N&W livery.
I don't think any manufacturer has ever made the N&W 4-8-0 mastodon. Might be nice project for 3rd Rail. The Abingdon branch mastodons had spark arrestor stacks. Others such as the Stassburg 475 do not.