You are not going to have luck finding a company to ship spores to CA. Its one of 3 state where it is not legal. Your best bet is to go to a shroom website (shroomery.org, mycotopia.org) and make some friends. After you have been there for a little while and make some contacts, you will probably find someone who will take pity on you and send you a print. FYI- you probably won't have much luck until you have been on there awhile and have at least 50+ posts.
Another thing you can do is hire an address forwarding company based in a state that it is legal to send spores. Have the spores shipped to that address, and the address forwarding company will forward them to you. Its discreet and they usually do not ask what is in the package.
Or, even easier, if you have a friend in another state ask them for a little help.
Good luck!
P.S. Make sure you only order from approved vendors. Check out shroomery.org's list of approved vendors. There are a lot of companies out there that will rip you off. Anything less than $10 per syringe and you are probably gonna be disappointed. I got burned my first time with a discount vendor.