Yacht clubs. Country Clubs. Social Register. And Voter Rolls.
Who are you looking for, because they are probably not that hard to find. For example, springstein, bloomberg and gates all have daughters in the equestrian scene, so hang out at Wellington FL and they'll probably show up at some point.
Lots of them have summer houses in the Hamptons Long Island and a lot live in or near Greenwich CT.
You just have to poke around a little, figure out their home town and check the voter rolls for that state and you'll have their info.
IMO Gates and Fauci are your best protest targets. So find them first.