Just heard from M-edge. I asked if their case(s) would fit the 950. Here's their reply:
Thank you for your interest in our products! All our product are designed to be custom fit for specific devices and unfortunately we cannot recommend using any of our products with any other device. Due to the slight difference size our Kindle 2 products would not securely hold your PRS 950. Currently we have no immediate plans to make products for the Sony PRS-950. Should we receive a considerable amount of customer interest we may decide to make accessories for this item in the future, however, it would not be until sometime after the holidays. I have made note of your interest and passed it along to our Product Development team. Are there any specific items that you would really like to see for this device? We are keeping track of all product requests and it is very helpful to know which accessories our customers are hoping for. I look forward to hearing back from you!