I don't remember seeing anything in the movie that can really be a paper prop. Better to say what you're looking for specifically (What prop from which scene?).
Well, the Anatomical Chart Company used to have some screamin' deals on less than perfect skeletons, skulls, and bones by the pound. http://anatomical.com/bcategory.asp?c=7 The deals don't seem to be as great as they once were, though. There's also http://www.boneyardbargains.ca/mainpage1.html, which I think is not actually related to Anatomical Chart, but they do seem to have some good prices on skeletal parts. I think the prices are Canadian, too.
Anatomical Chart used to have a section called Bucky's Boneyard or something similar, but I think their old version was cheaper and looked better. Oh, well.