they still make cassette players, the walkman type. i have one that connects to usb, though it's not very good (you have to leave it open or it presses down too hard on the tape, making it play too slowly). i know i've seen them at urban outfitters.
Actually, the only thing that wasn't stolen at the Louvre's Apollo Gallery is the Regent Diamond, figure no one would take it because something to do with a curse.