The clincher is, a cassette tape is fairly chunky and can be ripped off the front of the magazine and lost. Records are comparatively thin (though quite large)

The clincher is, a cassette tape is fairly chunky and can be ripped off the front of the magazine and lost. Records are comparatively thin (though quite large) and could be made as flexible sheets which can be stapled into the magazine as a tear-out or pull-out insert, removing the issue of them going missing. Catch is the paper-thin ones don't last for many plays, and you need a fairly well-adjusted record player to use them. Some recording formats are more tolerant of speed variation than others. FSK-based ones like CUTS/Kansas City should be fairly tolerant, pulse-timing based ones possibly less so.