You're in Switzerland? I would think it would be possible to find it there. For over 30 years I couldn't get it in Rome (same for sour cream) but finally it's sold in health food stores imported from Germany (and wow! it's better than anything i had in the states). Before i found it, i used yoghurt, but i have to say that buttermilk is a whole nother thing. Pancakes, muffins, breads, all those floury things, come out unbelievably well.
If you're in the italian section of switzerland it's called "latticello" - in the german section it's "buttermilch" and in the french i have no idea.
"Siduri said, 'Gilgamesh, where are you roaming? You will never find the eternal life that you seek...Savour your food, make each of your days a delight, ... let music and dancing fill your house, love the child who holds you by the hand and give your wife pleasure in your embrace.'"