I'm looking for a some sort of hard(ish) back cover to use in conjunction with my existing bumper. I like the slim profile of a pumper case but would like some protection for the back. Rather than a skin style cover, I'd love some sort of plastic cover that would stick on. I managed to get a couple small dents on my 5 (likely from bumping into things while in my pocket). Anything out there that I should look at.