Okay, sorry about the delay. I had to go somewhere. Now I'm back, and I can answer some questions:
Yes, this is the cover that came with the case. The texture is not rubberized like the stock battery door. Also, it doesn't creak as much as the stock cover. In fact, for me it doesn't seem to creak at all. And remarkably, the case doesn't show up in the picture
.
Here's a pic taken with the back door on.
By the way, I was thinking about getting that Seidio battery and returning this one. I saw a link on this forum where somebody had posted pics of how the 2000 mah battery looked, but I lost it. Does anyone know where it is?