Where can I find Mega burger bun in Flumenthal?

Mega burger bun can also be found in these cities:

Balsthal Biberist Breitenbach Burgdorf Delémont Derendingen Egerkingen Gerlafingen Grenchen Herzogenbuchsee Huttwil Kirchberg Langendorf Langenthal Moutier Murgenthal Oensingen Solothurn Utzenstorf Zuchwil

You can also find this in Flumenthal:

Milk Baking Ingredients Beer Jam Vinegar Beef Spices Cocoa Normal Rolls Acid Preserves