I know it's a little late, but here's a source. Maybe for next time. They have a bunch of Canadian locations. Fastenal on the forums seems to be either a LOVE or HATE kind of place.
1/2-10 x 12' Plain Acme Threaded Rod http://www.fastenal.com/web/products...ex?sku=0162475
$36.84 ?local stock? they say normally 3-10 days
1/2"-10 x 6' ACME Low Carbon Steel Threaded Rod http://www.fastenal.com/web/products...l.ex?sku=47549
$22.26 should be a local stock item
or try Bolt Supple House