When I dug out my great-grandmother's "The 800" Polaroid camera last year, I bought some 40-series film from ebay. Some rolls worked, some had dried chemistry. Oddly, I got images from film expired in 1968, but had no luck with film from the 80s. What I did get wasn't great, but it was fun, and I have more to shoot.
I'm not sure how the old instant roll-film pods compare to what you are using, but if you can borrow a camera or get a cheap back, give it a try.