Piggy there are a TON of guinea pigs in Los Angeles shelters right now, also this is a great rescue group in Orange County-
Orange County Cavy Haven - Guinea Pig Rescue
if you take a look at that site they have shelter pigs listed as well as pigs whom they are fostering.
I am serious when I say there are a ton right now, this week there have been about 20 or so pigs that were dumped in different shelters, all in danger of being "put down" if they do not get adopted.
Good Luck!