Where can I find Mega burger bun in Bischofszell?

Mega burger bun can also be found in these cities:

Abtwil SG Amriswil Appenzell Arbon Bronschhofen Bütschwil Constance Degersheim Flawil Friedrichshafen Goldach Gossau Herisau Immenstaad am Bodensee Kirchberg Kreuzlingen Müllheim Münchwilen Romanshorn Rorschach Sirnach St. Gallen Sulgen Teufen Tägerwilen Uzwil Weinfelden Wil Wittenbach Zuzwil

You can also find this in Bischofszell:

Vegetable Juices Instant Iced Coffee Cheese Roll Canned Fish Fat Sauce Powder Spirits Stews Bakery Products Red Wine