I bought plastic ones at Ikea (a whillllle ago) then upgraded to metal ones at a kitchen store in Lausanne (which is now closed). I wonder if Aligro has them. They have a nice "stuff for baking" section. Also see if our member "Crumbs" has some at her baking goods store.
I actually see them all over, not exactly like those but metal in teaspoon and tablespoon measurments. You just need to look better, am sure I saw them at Coop once.
I saw them at Interio (in Rennweg) earlier this year (I believe I got mine at Coop City, but cannot tell for sure). Worse comes to worst, the spoons you have at home measure roughly the same amounts.
Ask for Messunglöffel in large Coop or Migros and they should happily show you to the aisle (past brown sugar dept. ) to the left... Got ours from Ikea in Spreitenbach.
Look out for big mesuring cups like the ones below, it's what the locals use and they're more conspicuous. The smaller "ladle"-type stuff will be nearby on a shelf.
Odd... I got mine at Migros Löwenplatz last year. Also measuring cups which look more like little pots (they all have a handle). They're made from metal and the handle is covered with some red rubber-plastic stuff.
Maybe they are out of stock at the moment since it's so close to Christmas and either people needed them now for baking or got them as a Christmas present?
Like jacek said, you probably should ask someone from the store if and where they have it.
Another option might be Blattner AG at Seefeldstr. 17. (Take Tram No. 2 or 4 to Opernhaus or Kreuzstrasse, shop is between those two stops) Shop is closed on Mondays!!
I found my little nutmeg grater there after hunting for it in Migros, Coop etc.
Enter the shop and ask the guys at the counter right away what you're looking for. The shop is a maze and without help almost impossible to find what you want.