Go deep deep deep through your contacts but hard to have warm intros unless you really know people or are living and breathing that SF life.
Here’s a list of 3000+ vcs that might be useful - https://cookiecrumblemedia.com/massive-list-3000-early-stage-vcs-investors/
Either go with people you know who are good or hire a recruiter and get to know more people.
Regardless good people come with high prices so figure out how to afford them.