You should be able to find what you are looking for at a
Reformhaus (bio store). Müller in the ZH HB has an OK selection, but I prefer Terra in Männedorf (the store is at the train station) - they have a nice fresh bakery, and are happy to advise you (at length!

) on healthy options.
Also, check out your local bakery, even if it isn't bio/Reform; you can find wonderful full grain breads at most bakeries.