Use "8-track" tape. Old Glen Campbell tapes are readily available cheap on eBay. Not the _best_ quality tape, the broadcast cart tape could be better (though some was pretty lame, near as bad as the crap the 8-track duplicators used). Get several. Look for mold, filth, dope-dust, sticky-beer.
One advantage to BC Cart: they un-screw. Most 8-tracks are glued together. Another reason to get several... practice your busting-open technique.