If you still cannot choose a suitable case for your reader or iPad or none of the available ones just suit the size of your gadget, this post may be helpful for you.
Oak frame covered with leather
Laminated fabric is cut and pared for better adhesion of the glue.
Cutting the leather
The cardboard is glued to polychloroprene
Painting the edges
Applying polychloroprene to the cover for the further sticking of the laminated fabric.
Cutting off the excess leather
Marking the place for the frame
Applying polyurethane adhesive to the details, when it dries the details must be heated and stuck.
Cleaning with benzine
Some other cases made in a similar way