ok, I understand where you mean. As RickH said, you can't buy that piece. You'll have to find a donor car. You can buy the peice that is actually part of the wheel well behind the inner rear quarter window panel (better description?), But not the rear interior panel itself. Oh, also as RichH stated, Pics are best when trying to describe something, and spell checker is your (and our) friend.
Best of Luck,