If we ship it from here to you, I don't think that the post office handles something as big as a whole axle. You would be forced to go with FedEx or UPS which will $$$$$ the hell out of you with 'brokerage fees' shipping it over the border, not to mention the $$$ to ship alone...
The only way that I could think of to "package" it would be to use thick heavy duty tie wraps and strap it to a pallet....
Cosgig could hang onto it until someone from Canada can come get it and take the next leg...