You can get them in Germany at "PLUS" white and wheat.
Go to www. plus.de for locations.
One right in Jestetten , that's on your way from Zuerich to Schaffhausen over the German side.
Also Edeka/ Neukauf Markt in Jestetten . There is also a very nice Edeka E - Center in Tiengen , open until 10pm, they have a very nice selection on international food, Indian, Greek, American and so on with fresh fish ( great tuna for sushi) , meat and cheese counters.