E Ink monitor with open source hardware driver board running opens source firmware/gateware is available on Crowd Supply with estimated shipping in December 2026:

https://www.crowdsupply.com/modos-tech/modos-flow

It has high resolution E Ink panel (ED133KC1/EC133KH1) with IGZO backplane. Both monochrome and color models are available, color one has frontlight and comes with USI stylus.