If you're willing to take it a step further and have some experience with hardware (or you are willing to learn), you can even buy a bare e-ink screen and interface with it. For example, the ED060SC4 is cheap. The datasheet is not very helpful, but if you look carefully, you can find some drivers on github, or more generic tutorials on e-ink drivers.

http://essentialscrap.com/eink/ is probably one of the most helpful resources out there if you want to do this.