Where can I find Mega burger bun in Oberdorf?

Mega burger bun can also be found in these cities:

Altdorf Buchrain Buochs Ebikon Emmen Engelberg Goldau Horw Ibach SZ Ingenbohl Kriens Küssnacht Lucerne Malters Sarnen Sempach Stans

You can also find this in Oberdorf:

Rice Pudding Baking Powder Spelt Bread Nut Nougat Cream Balsamic Vinegar Pork Spice Blends Potato Products Rye Roll Canned Tomatoes