I think you need to find one of those people collectors. I know one of them, and I could ask him to introduce me to somebody with <insert skill/interest> and he'll know somebody within a hundred miles.
Of course, people skills are necessary... https://www.youtube.com/watch?v=fcIMIyQnOso
In contrast, my Dunbar number is about 5. I need a few days to calm down from meeting new people. I can't imagine putting in the effort that he does in collecting people. COVID lockdown was a welcome break for me.