Take a look on Kijiji, Ebay or Craigslist, the prices vary depending on the condition of the cage. Shipping would be expensive as they are so darned heavy as I found out when I bought mine in flat-pack form. Also I would suggest you contact the Ferret Lovers Society of Atlantic Canada (
http://www.flsatlanticcanada.org), there maybe someone there. There are quite a few ferret owners in Newfoundland.
Good luck, Ferret Nation make an excellent cage.
http://www.drsfostersmith.com/ferret/cages-playpens/ps/c/17342/17345 for new cages too.