So I just bought some little brown notebooks from Target and they were a two pack held together with some plastic (thicker than saran wrap and thicker than window sheets/transparencies, but more flimsy than the stamp boxes the SU stamps come in).
Anyway, not wanting to just toss the stuff, I wondered what I could do. So I punched them (it worked easily for me, but results may vary

). I've attached a picture of the pieces. I colored mine with sharpies (some really awesome pastel colors!).
I can see using these on my SB pages just like the 'ghost' ones (is that Heidi Swapp?).
I'm just sharing the find! Have fun!