Shure has excellent service, and a flat-rate for most products. Go to their
website where you can print out an address label.
I see, though, that they specifically say that items shipped from Canada are automatically forwarded to their Canadian distributor in Quebec. But I went to the Canadian distributor's site and they just redirect you back to the main Shure page when you click on "support". Looks like a call to Shure's "distributeur autorisé" will need to be your first step. You don't want to drop a $1k mic into the mail without knowing where it's going.