Once you've had a sleep cover, you quickly become spoiled to it. I feel the same way by standing covers so I got this one.
https://smile.amazon.com/Kobo-Aura-O...CGDKG86F8M217M
Unfortunately, it isn't a sleep cover, but no others are making one like it that is. so I'm going to have to operate on it to suit me. As soon as I locate my wayward X-acto knife, that is.