I recently ordered a minimally structured Dugdale wool sport coat and it was $650. I think prices are lower for fully unstructured cotton. Best to send them an email describing what you want and they will quote you a price.
As I prepare to place an order for a sportcoat, trousers, and several shirts I am starting to realize that the flat fee/no duty option is sounding very attractive. I just don't tend to place orders for one shirt at a time. Maybe Luxire can begin to offer this flat fee shipping option for larger orders to Canada as well.
Definitely curious about this too. I've been holding off on buying a pair of OBs and then having them replicated into different colors... if someone else has already tried it perhaps I could copy their order instead.