Peruvian cumbia collectors maintain private groups where they share high-resolution FLAC files (not MP3). Search for "Cumbia Peruana Coleccionistas." These groups often have exclusive access to "Maquetas" (demo tapes) from 1982.
Because their career spanned decades, many fans prefer comprehensive "Exitos" collections to get the full experience. You can find many of these on platforms like Historia Musical del Grupo Miramar - Spotify grupo miramar discografia completa exclusive
Their discography is extensive, spanning decades of original releases and countless modern compilations that keep their "tropical" and "romántica" legacy alive. grupo miramar discografia completa exclusive