Does anyone know of a back cover that just sticks on, sort of like a decal, but it's made out of a somewhat rigid plastic? I bought the SGP neo hybrid, but the silicone portion covering the back of the phone makes me a little nervous as it is a bit thin. I want something that I can either directly stick to the back of the silicone, or back of the phone then put the silicone over it, that will add some "hard" protection for the back of the phone (but nothing too drastic). Something between a full piece of plastic like you'd find on an actual case, and a "decal". Any ideas?