Call the dealership service office and they will get you squared away.
That's really a question for the dealership, but I know one thing for sure, if they can do it for you it is going to be pricey. There are locksmiths who can make you a key for much cheaper than the dealership can. Try Googling locksmiths and call around for prices, even if it's a special key they can do it for you. Good luck! ;)
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