Anthony,

If you reach in on top of the tank and start feeling around, you will likely tear the sheet up unless you really take it easy. Without dropping the tank, you can stick a digital camera up in the gap between the body and the top of the tank and take a couple of pictures (one driver's side and one passenger's side) to locate it and then decide how you want to tackle getting it out. This will require that you remove the spare tire tub and upper spare tire lid but that is not that difficult.

This morning, I took my vette to the shop and had it raised on a car lift.  I felt and looked on both upper sides and top of my tank but found no sticker.  I used a flex mirror and flashlight and was not able to see even a trace of a paper options sticker. 

That's to bad. I found mine whenI took the body off. It had folded over which helped to protect most of it.