Welcome to our forum.
I found one Central Cali Coast poly group at http://groups.yahoo.com/group/slo_poly/
... but I don't know how active they are or what they do. You can also try http://www.polyamory.com/forum/forumdisplay.php?f=11
Your current situation sounds hopeful even though it has required some work. I think if you take it slow and keep the communication channels open, the Z configuration has a good chance of staying intact.
Hope Polyamory.com can be of help.