Bossa Nova Online has an insane collection of Bossa Nova album covers. I counted over 2000 albums! what! Tons of records from the 1950s, 60s and 70s. You can sort by labels as well. The site has archives for some of my favorite labels including: equipe, Forma, Odeon, Elenco, MPS and Som Maior. I’m not sure if these records are store inventory or part of someone’s personal collection. Either way you can easily spend a few hours browsing this monster.
Also worth checking: