I found this, what I believe to be a build sheet of some sort, since I've never seen one, I'm not sure. I found it up under the rear bumper. The torn off piece is unrecoverable unless I take apart the entire rear bumpper assy. It took me about 30 minutes to preserve this much. It felt like it was glued in place. Date at the top states May 21st. Any ideas? I will preserve this in plastic unless it's useless.