Where can I find Lamb's lettuce in Heiligenhaus?

Lamb's lettuce can also be found in these cities:

Bochum Bottrop Duisburg Düsseldorf Erkrath Essen Herne Hilden Mettmann Mülheim an der Ruhr Oberhausen Ratingen Remscheid Solingen Velbert Wuppertal

You can also find this in Heiligenhaus:

Speculoos Baguette Yeast Dry Rye Breads Granola Bar Pies Cola Legumes Ketchup Chips