In order to get to the package tray trim panel, rear speakers,and 3rd brake light bezel you have to remove the rear seat (upper part/ seat back).
All you have to do is fold the pass thru parts of the seat down and you should see 4 large bolts that are 13mm in size, you cannot miss them, they are the only bolts exposed if I recall correctly.
Remove these bolts and lift up on the seat back and it will come right out,(I just flipped it upside down and removed it through the rear driver side door). Now you will be able to remove the package tray trim panel by removing two black plastic push pin fasteners. I didn't have to remove the side panels in order to get the package tray trim panel out of the car, I just simply pushed down on one side of the trim panel and kind of lifted the side panel out and the trim panel came right out from underneath the side panels, just be careful, the trim panel will bend a bit but don't over do it because it looks like it will break easily. Once that is out of the way there is an insulation mat that just lays there and is easily removed. Now you have access to your rear speakers (if you ever want to upgrade them)and the 3rd brake light bezel. The bezel is held in place by some plastic tabs and is also easily removed, just take note of how the tabs lock in place and move it around a bit, it will come out, I think I pulled it back away from the rear glass and up to remove it, don't forget to remove the bulbs first. When you have it out of the car, remove the silver reflector from the bezel and use masking tape to cover the backside and frontside of the lens and now you are ready to paint! I used plain old "Color Place" (Wal-Mart) gloss black spray paint to paint my bezel, just did it yesterday (Monday). Just be careful and spray light even coats and it will look great. I let the paint dry for about an hour and then put it all back together and it looks great! No more gray bezel standing out like crazy, but a nice black one that blends in well, all you really see is the red lens.
As for where to get the stickers, I have seen some on "ebay" that say "Ford". They look nice but I don't have one yet, I guess if I ever get one then I will do this all over again.
I know this has been a long read but I hope it all helps. thumb