Where can I find Tri-grain toast in Rubring?

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

Ansfelden Aschbach-Markt Asten Enns Ertl Haidershofen Kleinraming Lanzenberg Leonding Linz Marbach Niederneukirchen Nußbach Ried in der Riedmark Sankt Florian Sankt Georgen an der Gusen Sankt Marien Seitenstetten Steyr Steyregg Strengberg Traun Urltal-Monument Weistrach Wolfern

You can also find this in Rubring:

Edible Curd Flaxseed Bread Fruit Bar Olives Drinks Spaetzle Flips Food Supplements Delicatessen Sauces Raisin Slices