I looked at some K2 cases on the internet yesterday. Most seemed okay, but a few were made with rounded edges at the 4 corners because the K2 has rounded edges. The squared (or nearly squared) edges of the 950 won't work in a few cases where the corners were raised to help cradle the K2. So be aware of that.
I finally gave up and just ordered Sony's cover. In the end I got free shipping and a 15% discount due to registering my 950, so it cost less than the other cases I saw that might or might not have fit well.