I have set up Table Rate shipping which works very well, however, my customer only wants to ship like this to customers within Canada. She wants any International customers to call to get a rate. What is the best way to set this up? Ideally I'd like the system to detect that the customer is outside Canada and then not offer him the same table rate shipping that Canadian customers get but offer him an option to call for a rate and then complete his order. Can this be done?