Where can I find Three-grain bread in Rüthi?

Three-grain bread can also be found in these cities:

Abtwil SG Altach Altstätten Appenzell Au Buchs Diepoldsau Dornbirn Feldkirch Fußach Göfis Götzis Heiden Herisau Hohenems Koblach Laterns Lustenau Mäder Nenzing Nüziders Oberriet Rheineck Sankt Margrethen Schlins Schnifis Schwarzach St. Gallen Sulz Teufen Thüringen Walenstadt Weiler Widnau Wittenbach Wolfurt Übersaxen

You can also find this in Rüthi:

Drinks Spaetzle Snacks Horseradish Salad Dressings Hamburger Buns Fruit Brandies Licorice Tri-Grain Toast Sugar