I got the 2.13 250x122 e-ink display this time
And there is actually a wiring diagram for a very similar display but different size:
http://developer.wildernesslabs.co/docs/api/Meadow.Foundation/Meadow.Foundation.Displays.Ssd1608.html
I got it connected but still cannot make it work. I will post a question about it in a different thread.