For the Two-Face Edition you can most probably get it from 365games as they also stock US games plus the currency can be converted to US Dollars. See if you can create an account and it should show that they can ship to Canada as well?!?
http://www.365games.co.uk/search/bat...city+steelbook
or ozgameshop
http://www.ozgameshop.com/search/bat...city+steelbook (they're the same company though)
As for the
Catwoman Steelbook variation, I have a feeling that the PC version gets a different picture to the console version?!? Maybe? :O