I got this one but the right side sticks up in the air toward the middle as it doesn't quite fit properly. Not quite enough depth molded into the pocket, it may or may not stretch in but it doesn't look like it will.
I ordered it before I got my kindle:
After I got the kindle I tried it in my K4 case and found it fit. The old case I cut the side and bottom out more with scissors/utility knife and also cut off the piece that folds over and snaps as it was in my way when I was reading. The bottom part I cut is just the area under the buttons so I left those fancy corner pieces in place. For the K4 i cut off the right side ( just above and below the page buttons ) the same way to allow access to the fwd/reverse page buttons. It has more of a stiff solid build to it and works better for me. I like the feel of a book as I read, old habits I guess. I ordered another which I will cut the same way to use with my new PW