"Clubs" in the traditional sense of the word (with meetings, dues, officers, etc.) are sort of a thing of the past. There used to be a club down that way called Early Broncos Limited. Their members also started the Early Bronco Registry, a national organization, which still exists in a sort of diminished capacity and has one annual event, Bronco Daze, which is coming up next month. But for the most part clubs have gone away, but there are several social media based groups. So Cal Broncos is one (our Facebook groups are way busier than this forum), and we do have members from the San Diego area. I think there are a couple of San Diego-specific Facebook groups out there, should be easy to find online or maybe someone who is in them will see this and chime in.