Sounds like you missed the first rebirth, 1990. But the second began around 2011. Link I can't say I've seen brick and mortar stores focused on 8-tracks in the past decade or so, but they're often displayed prominently in the hipster botiques. (I use the term "hipster" pretty loosely. Beyond Brooklyn and Portland, I'm not sure what to call the people in Salt Lake City and Santa Cruz, Mendocino, Seattle...)
In that case then it's time to re-launch 'Sabamobil'. The in thing for cool hipsters everywhere. Just the thing to play your Black Forest MPS/Saba jazz tapes on..