Where are you located? if in a big city you might be able to find a
local Bonsai Society that can help you.

http://www.absbonsai.org/canadaClubs.html

Importing is a messy business, you need to first get an Import Permit
from Agriculture Canada for $35, then you have to pay the exporting
nursery extra fees for certificates to prove their plants are free of
disease and not an endangered species.

Here is a site that sells bonsai plants in Canada I found on Google
http://www.shikoku.ca/