I wouldn't use pleasantville. It's too done. People all over the state will use it and the markers will get sick of it. Not to mention that half the state will use it for changing perspectives as well. I know it's hard to find them, our whole grade nearly had a heart attack when we heard that there was yet another topic to find related texts about. Try Monty Python stuff, it's hilarious as well as postmodern. There are some postmodern songs as well, like some David Bowie stuff and Blondie's "Rapture". There's also a book by Umberto Eco called "Travels in Hyper Reality" that my friend says is good and really postmodern. Anyway, hope I could be of some help!