Hey crusierdad76,
Yep, he had to install it to keep up with that Vette of his!

Just kidding!
Nah, that is a really way too cool NOS Tank/ Speaker Sub Box. I can't remember who made them, but they did a pretty good job as I recall on all the detailing of the bottle making it hard to tell from the real thing!
Hey PTC06Peet,
At least as a partial answer, you could check around and see if you might have a reasonable Tint Shop to darken up the windows if you don't have any luck finding a shelf. I had me done in Limousine Black up to the front doors, and then had my front windows (which may be llegal in many states so check first), and sun strip across the windshield done for $130.00 once upon a time, but just for the back doors, rear sides, and back glass, your probably looking at around $80 - $100 for a decent job, and its pretty tough to see much of anything inside, or in the back seat! I would definitively check the wrecking yards, or EBay for a shelf as well, if you need a backup.
Candyman