Onyx has models like this, but check the mobileread forums for discussions about them before buying because the site is pretty terrible in terms of amount of info (at least for me on mobile).

I also thought they were going to be jumping to Android 6, but the site still looks like all 4.x.

http://onyxboox.com/product#lineup-5

Looking at the linked online shop, 9.7" is ~$380 and 13.3 ~$800