Not sure if you're aware of the awesome modification of Mount & Blade game called The Last Days.
It's community-made, non-commercial project with tons of beautiful 3D models, textures, sounds, music, etc. I believe it's the most complex game modification in Middle-earth settings that was ever made.
Maybe some models could serve as an inspiration, or maybe we could get in touch with the team and ask them if they would be willing to donate some models.
It seems that although it exists for years, its development team is still working on it. The number of places/models grew a lot in recent years.
I've made an album to showcase some places from this beautiful game:
https://imgur.com/a/A1OlH
