Where can I find Mega burger bun in Obersteckholz?

Mega burger bun can also be found in these cities:

Balsthal Burgdorf Derendingen Egerkingen Egolzwil Gerlafingen Herzogenbuchsee Huttwil Kirchberg Langenthal Lostorf Murgenthal Oensingen Oftringen Olten Reiden Rothrist Schöftland Schönenwerd Suhr Unterentfelden Wolhusen Zell Zofingen

You can also find this in Obersteckholz:

Fish Croissants Flour Wheat Breads Diet Products Ready Meals Energy Drinks Espresso Beans Food Flips