I found a back shell with a rubber edge that covers the buttons on the side for the Moto E4. It is raised slightly around the camera on the back which provides protection for the lens. There are cutouts on the top and bottom edges for the 3.5mm and USB ports, etc. The back is mostly clear with either red, blue, pink or black color around the edge. It fits well and is a lot like the “Grip Shell” for the original Moto G. They were boxed and sold by Metro PCS originally but are now on ebay. The link is below and I have nothing to do with it other than having bought 2 for my phone.