I should have thought of including a link: https://www.aliexpress.com/item/400x300-4-2inch-E-Ink-display-module-No-backlight-Ultra-low-power-consumption-SPI-in

I should have thought of including a link: https://www.aliexpress.com/item/400x300-4-2inch-E-Ink-display-module-No-backlight-Ultra-low-power-consumption-SPI-interface-Compatible/32826601765.html https://www.aliexpress.com/item/400x300-4-2inch-E-Ink-displa... I've seen libraries for driving this specific one, so I assumed I can hack it to work. The 800x600 size is perhaps more "useful" but slightly more expensive than something I'd buy without a real need.