If I was a third-party case manufacturer I wouldn't bother with the Sony readers. Sony changes them every year making the older cases obselete for the new readers. Plus Sony doesn't sell that many readers compared to Amazon. I guess maybe the actual third-party case manufacturers do as I would because it is difficult to find any nice cases for my 350. I'm currently stuck using the Sony case I had for my 300, but it is bigger than I would like and I have to use double-back tape to keep the 350 attached to the case as the connector spline was too long.