Intrigued, as well. I've just checked the ingredients and compared to what I have in the kitchen (Migros' own fat-free brand of vegetable bouillon "Gemüse bouillon, fettfrei"). The ingredients are the same up to one of the herbs: in the Marigold brand there is "lovage" (= Liebstöckel) and in the Migros brand it's chervil (= Kerbel).
So, I expect what you are looking for is actually available in all shops - just get the "Gemüsebouillon" by Knorr, maggi or Migros. For organic versions, go to your local health food store (Reformhaus).