If you don't discover what you're looking for trying Insweb, use another internet service such as esurance.  Esurance not only supplies a comparison of Arizona automobile insurance rates, but it also has a wealth of information about buying car insurance.  If you still aren't gratified, the next step is to pick up the phone and call major insurance companies.  Most states such as Arizona have offices from the big insurance companies, like State Farm and Allstate.  You can also try national carriers like Geico.