Where can I find Tri-grain toast in Arth?

Tri-grain toast can also be found in these cities:

Baar Buchrain Buochs Cham Ebikon Einsiedeln Emmen Goldau Horw Ibach SZ Ingenbohl Kriens Küssnacht Lucerne Richterswil Rotkreuz ZG Stans Steinhausen Stäfa Unterägeri Urswil Wädenswil Zug

You can also find this in Arth:

Butter Bread Cornstarch Spread Sweet Food For A Low Cholesterol Diet Pasta Dishes Fruit Juices Instant Cappucino Breakfast Croissants Canned Food