If you're not dead set on having eink, there's always the ESP 32 cheap yellow display board: https://makeradvisor.com/tools/cyd-cheap-yellow-display-esp3...
If you're not dead set on having eink, there's always the ESP 32 cheap yellow display board: https://makeradvisor.com/tools/cyd-cheap-yellow-display-esp3...
Where are we at on transflective lcd? I saw a decent demo a while back but I cannot recall the brand.