any shop that deals in 22 ammo can most likely call the supplier and bring in a brick of anything you would like. often a box isn't enough to really know, and if you have more than one 22 to check you will glad you bought it by the brick. In Toronto the dealers have access to one of Canada's premier 22 bullet suppliers.
I had great luck with the last lot of Eley green box, in almost everything, shot better than some Tenex, then recently been having good luck with Lapua SK Rifle Match, not too expensive either. $600 by the case if you buy right.