I'm not sure exactly where you live in California, but the Pembroke Welsh Corgi Club has a listing of national rescues, and 2 are in CA:
http://www.pembrokecorgi.org/rescue.html

And the Cardigan webpage:
http://www.cardiganrescue.org/

I'm sure there are more, too. So sorry to hear about your news, I know I would be very upset as well.