Men's New Romantic wig from the 80s when massive bleached hair was the thing and if it had a bit of a mullet going on, even better.
For 80s fancy dress just roll up the sleeves of your jacket and hems of your baggy trousers, wear a cotton square scarf around your neck and put on a little bit of guyliner.
Oh, those were the days... sigh. Duran Duran, Miami Vice, Moonlighting with Bruce Willis and Sybil Shepherd. I think even Bono had hair like this in 1982