Where can I find Mega burger bun in Bichwil?

Mega burger bun can also be found in these cities:

Aadorf Abtwil SG Amriswil Bauma Bischofszell Bronschhofen Bütschwil Degersheim Ebnat-Kappel Flawil Frauenfeld Gossau Herisau Kirchberg Matzingen Müllheim Münchwilen Romanshorn Sirnach St. Gallen Sulgen Teufen Uzwil Wald Wattwil Weinfelden Wil Wittenbach Zuzwil

You can also find this in Bichwil:

Desserts Dessert Baking Mixes Cake Glaze Peanut Butter Ice Cream Rice Dishes Vegetable Juices Instant Iced Coffee Cheese Roll Canned Fish