I have done some study on canard airfoils. Even talked to John Ronncz (the deisgner of the Roncz MS1125 used as the replacement canard for the longez).

DO NOT USE the scale airfoils from Rutan. They are great for full size but as with most (all) airfoils dont scale well. The same airfoil at 1/3 scale (or any other scale) will react very differently to the full size.

Any semi symetrical airfoil for the main wing and an almost flat bottom (clark y even) for the canard should work well.