Where can I find Tri-grain toast in Bönen?

Tri-grain toast can also be found in these cities:

Arnsberg Beckum Bergkamen Dortmund Hamm Holzwickede Iserlohn Kamen Lünen Menden (Sauerland) Nordkirchen Schwerte Unna Werne

You can also find this in Bönen:

Edible Curd Grated Lemon Peel Flaxseed Bread Fruit Bar Pickled Vegetables Fresh Salt Schupfnudeln Whole Grain Rolls Mayonnaise