Hi,
Several years ago I started a list for mostly prototypical scale steam era N&W items from various importers. If you are interested in adding to the list, post your additions and corrections and I will include them in the original post.
There are a good number of various hoppers with photos listed and various importers in the thread link below. I hope to get more photos to update in the near future.
https://ogrforum.ogaugerr.com/...02#40004362767072002