If you are looking for insurance for a couple of days, while you are renting a car, you may need to get the insurance through the rental company. Now, you may want to look into purchasing a "non-owner" policy. This policy will provide coverage for liability, medical payments, and uninsured motorist coverages for someone who does not own a vehicle and will be operating a vehicle owned by someone else. However, if you will still need physical damage for your rental car, obviously, the "non owner" policy will not help you. As a result, you will need to purchase the physical damage through the rental car company. Now, the good thing about the "non owner" policy is you will have the ability to keep this policy in force after you are finished with the rental car.