Where can I find Three-grain bread in Bönen?

Three-grain bread 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:

Baked Goods Yeast Fresh Pumpernickel Breakfast Cereals Olives Drinks Dry Herbs Spaetzle Snacks Horseradish