I like the one I'm currently using, but it is expensive. I bought it at Staples and it's listed as $34.99. Here is the Staples link, it's called the
M-Edge Go! Jacket.
It is relatively sturdy (although I've seen other cases which are sturdier) and comes with a pocket that will fit an e-Luminator booklight (sold separately). It's one of those with the four elastics that some people here don't like. I don't mind them, but I only use three elastics, leaving the corner with the power slider exposed.
https://www.mobileread.com/forums/pic...pictureid=5268
The empty case. You can see the stitches for the pocket where the e-Luminator slides in.
https://www.mobileread.com/forums/pic...pictureid=5269
The case with my Kobo Touch.
https://www.mobileread.com/forums/pic...pictureid=5270
The top view, showing power slider.
https://www.mobileread.com/forums/pic...pictureid=5275
Back of cardboard packaging from the case.
If you are looking for inexpensive, this one is not for you. But I like it and feel confident using it, holding it with one hand with the cover folded back. I haven't bought a light to attach to it yet. It's not too bulky, so it fits in the pocket of my jacket.