I honestly don't know since there's no Marc Jacobs store or Neima Marcus. You can try Saks or online store like net-a-porter.com or neimanmarcus.com, or eluxury.com.
Go to this link to see authentic designer handbag stores. Who knows that they're selling Marc Jacobs and ship to Canada as well. You can also always try ebay.
As to MJ, you can find them at the Holts downtown - but their handbag section is under renovation right now and everything is seriously squished together ! I mean, they've got Goyards hanging off a rack !!!