I don't live there but I found this online-- http://www.sumasmountainfarms.ca/ .
And also this one -- http://www.bigbearranch.com/ .
and this one--- http://www.grassonlybeef.ca/html/how_to_order.html say they deliver.
The simplest way to buy grass-fed beef is to buy either a quarter or a side and freeze it. That way you can get it packaged in sizes that suit you and your family and save multiple trips tracking it down.