when i have sent something to canada i used the postal service and always sent the tracking  number to the buyer in canada. I was always surprised how long it took to arrive. the charges aren't cheap, but then i figured two cost for serivce , one for us and the other for canada.
I can' image why a lens would cost $80 for shipping, even with the heavest box i have sent it couldn't have been over 50 ( i really don't remember, but paper and chemistry is heavy much heavier than one lens.)