I am thinking the other poster, rcj137, found the information at www.familysearch.org
That site is free to search without registering, but you do need to register to see some documents.
I know that site has the California death index, and also has some actual death certificates for some counties.
If that is where rcj137 found your death certificates, I am very impressed. When I have searched that database, the index numbers never seem to match up with the certificates!