1968 340S Coupe 4spd

You found a broadcast sheet in the bottom springs of the front and the rear seat? I have a bench seat, and I don't recall ever hearing that they put them there. Usually just the rear and in a front bucket seat.
Have you checked behind the glovebox yet?

So I was expecting one under the rear bench and one behind the glovebox. First, nothing behind the glovebox (besides the nest). Then nothing under the rear bench. As I was removing the front bench i found one sheet up there. Then the other day as I removed the rear bench back- I found this nice one pictured above.

As I mentioned, I expected what you heard, too, but this one is what it is.