I have a color Nook - and was concerned about that as well. I purchased a "hard" cover.
So . . I have not made anything like that, but I might try using two layers of Decor Bond with batting in between - the Decor Bond would give your screen some protection. These new electronics are rather fragile - I am not sure that you could completely protect it in a large fall but you may be able to save it from "bumps".