> I basically want to build a custom e-reader with a RasPi Zero for learning/home use, 8-10inches would be great.

Though smaller than your target size, I did[1] something similar, and it was great fun. I believe there are still Waveshare hats with larger display sizes.

[1] https://johnj.com/posts/e-paper-rpi-display/

Oh looks like a fun project :D nice writeup.

Yeah even I could only find waveshare displays at the size I wanted that were cheap enough not to burn a significant hole in my pocket.