You won't have luck looking around anywhere in Northern California. I am assuming that you mean you are looking to buy. You should know that it is illegal to sell a chuckwalla in the state of California (if we are talking about the common, native chuckwalla, S. ater (formerly S. obesus). You CAN buy a common chuck from outside the state and have it shipped in. It is possible to buy a non-native species, such as S. hispidus, or any number of hybrids, if you can find them in CA. I know there are some "Granite" chucks for sale on the classifieds section right now, and there have been some S. hispidus for sale recently (I got one myself, a great little lizard). They may still be for sale if you look in the older classifieds. Good luck!
Angus