Try Treck Hall, Deniz.
They have offices all over Canada and they do have a sales office in Vancouver. Send them a note as to what you want and they will fire off a quote to you. They do carry Kodak and Ilford 8x10. Try this link.
You can also check out your locals stores in Vancouver as, surely, some of them can get Ilford and/or Kodak 8x10 for you as a special order. Buy a whole case of film (10 boxes of 25) as you will save $$$ in the long run.
If you want other brands such as J&C, you will pay dearly i.e FedEx, Duties, Brokerage fees, Taxes, and film... It'll come to well over $3 Cdn per sheet! Way too much.
Eight Elm, Vistek, are also possibilities but I am guessing they will be more than Treck Hall.