That's not going to happen. The entire reason they didn't put it in the case to begin with is that it's not structurally sound. The case has to be thick enough, to support the phone with the kickstand out.
Besides, I WANT the case--the entire point is that it protects the phone, and keeps the camera from laying against the surface of whatever you set the phone on. One piece, easily removed for the car dock, and a reversible kickstand. All with what looks like the same texture on the back of the case that is on the phone (which I really miss that texture, having a PT case right now).
I'll take the official case over a new battery cover every day. But that's my preference. You have yours, and, officially, as of now, it's not coming. There will no doubt be a 3rd party cover, though, at some point.