I live in the New Malden/Raynes Park area and cannot find Quinoa flakes in the local Holland & Barrett or even in the healthfood store in Wimbledon Centrecourt. Does anyone know where I can get them, without having to order them by post, which ends up doubling the cost because of postage and packing? I'm also looking for brown rice flakes, millet flakes and buckwheat flakes.