Well, the title pretty much says it all. I live in Hamburg, and I tried some hardware stores in the city, but unfortunately no luck. Amazon and Ebay also returned me with overpriced options (like, 25-60 Euro), and I wouldn't want to spend so much money on a single light which I should be able to get for about 12-15 Euro.
If you're wondering why I need it, clamp lights are just a cheap and effective way to light a scene for me.
It'd be great if one of you may provide a website or a address!