I am in the process of pulling all of the interior apart and behind the rear interior panels I found what you see. The first two pictures are the pasenger side rear window. The picture all the way to the right is the driver side. It is in a little better shape but still needs the sheetmetal repair.
Its weird how the rust caused a bunch of potatoe chip pieces of metal to form.
Honestly, this looks much worse than it really it. I'm just going to cut the bad section out and replace it with a piece of flat steel sheet. No biggy.