If black/white isn't a core requirement look into BluBoard (bluboard.io). They are a Cleveland-based hardware startup that specializes in 18" epaper displays and related content management systems.

Sources:

[1] CES News Story - https://bluboard.io/news/bluboard-at-ces-2017-with-fellow-cw...

[2] BluBoard Chooses Multitech - http://www.multitech.com/news-and-events/press-releases/lork...

[3] Local News Segment - http://www.cleveland19.com/story/34321031/cleveland-start-up...

Disclaimer: I am the Director of Architecture at BluBoard