I have a '81 gtc and I live in Mtl,Quebec. The only way would be if you know someone with a address in the states (family or friend) that comes your way once in a while. UPS are the biggest thieves when it comes to duty fees,no wonder their trucks are brown,they are full of sh%?$#%? !!!! USPS are the cheapest for small to medium sized parts but the big and heavy parts, your stuck with the couriers.
Take care, Roberto