If you're on a budget and you don't mind some electronics tinkering, check this out: https://www.waveshare.com/product/displays/e-paper/epaper-1/... Only $170 for 12.5"! This is for Black/White. They also do a version with Black/White/Red but it takes very long to refresh so probably isn't suitable for interactive use. However I believe - don't know for sure!!! - that the B/W/R displays are just as fast as B/W if you don't use the third colour. But they do have a reddish sheen if that appeals yo you.

Also you'll have to do some coding to get this to work properly as it's addressed as 2 half displays. A bit like 4K used to work with DL-DVI.

However if you want something that just plugs in to DVI or HDMI, then get the paperlike. Huge price difference though.