Where can I find Mega burger bun in Aarau?

Mega burger bun can also be found in these cities:

Bad Säckingen Baden Brugg Buchs Egerkingen Erlinsbach Fahrwangen Fislisbach Frick Gebenstorf Gelterkinden Gränichen Hitzkirch Langenthal Lenzburg Lostorf Lupfig Mellingen Menziken Murgenthal Möhlin Möriken-Wildegg Nussbaumen Oftringen Olten Reiden Reinach Rheinfelden Rheinfelden (Baden) Rothrist Schöftland Schönenwerd Seon Sissach Stein Suhr Unterentfelden Windisch Wohlen Zofingen

You can also find this in Aarau:

Edible Curd Grated Lemon Peel Flaxseed Bread Fruit Bar Pickled Vegetables Fresh Salt Schupfnudeln Whole Grain Rolls Mayonnaise