I don't use pet insurance, but this site may help you:
Pet Insurance . com
Some vets offer a discount plan; mine offers a Preventive Health Care Plan, it is a wellness program where members receive discounted services on preventive measures like regular checkups and vaccinations. I pay a flat fee up front which includes various shots and services then for the balance of the year I receive discounts on all other visits/surgery.
Good luck in your search!
Judi