would there be many tapes from that era though? I don't remember seeing any until late 80s/early 90s when the mixtape thing really took off
maybe ask Alfredo, Padilla, Phil Mison, Jolyon Green, Moonboots, Pete Herbert, Kelvin Andrews, Nancy Noise, Antony Daly (586 Records), Timm Sure (Coyote), Dean Sunshine Smith - all those guys specialise in 80s Ibiza/balearic pop - They might be willing to share rarities but you'd have to convince them you're an enthusiast and not just someone wanting to punt these on discogs