Contact your credit card companies. See if you qualify for insurance for driving abroad. Check fees and shop for rates with all credit cards you may have.
Add insurance for driving in a foreign country while buying travel insurance. Check the difference in the premium and compare it with the fees you would pay if you got insurance through your credit card.
Rent a car from a popular rental car agency and buy a temporary insurance from the rental car agency. With a well-known company, you will most likely be assured of better services and better coverage. This may be the most economical method, depending on the number of days you plan to rent the vehicle. In most cases, this is usually the easiest and most cost-effective method.
Ask your friends, colleagues or company if you plan to borrow their car. It is likely that their insurance policy may cover anyone driving their car
Contact your existing car insurance company to see if you have coverage for driving in a foreign country. You may qualify for limited coverage under your own auto policy for certain number of days of the year without any additional charge.