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Most of the Corvette vendors sell the lock sets with keys. That might be the easiest since you probably need to pull the door panels and investigate the lock mechanisms.
If the locks work, you can easily get keys. Any locksmith worth his stuff can cut the keys. He can pick up the lock numbers and cut the keys and send you on your way in a short time.
I'll pm you how it is done since it probably isn't good to list this openly.