Where can I find Power bar in Graben?

Power bar can also be found in these cities:

Amberg Augsburg Bobingen Buchloe Geltendorf Kissing Königsbrunn Landsberg am Lech Mering Penzing Pürgen Schwabmünchen Stadtbergen Türkheim

You can also find this in Graben:

Rice Pudding Baking Powder Spelt Bread Nut Nougat Cream Balsamic Vinegar Pork Spice Blends Potato Products Rye Roll Canned Tomatoes