Where can I find Three-grain bread in Grabs?

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

Altach Appenzell Buchs Feldkirch Göfis Götzis Hohenems Koblach Laterns Mels Mäder Oberriet Schnifis Sulz Walenstadt Weiler Übersaxen

You can also find this in Grabs:

Milk Baking Ingredients Beer Jam Vinegar Beef Spices Cocoa Normal Rolls Acid Preserves