I've just ordered the Sharkoon VibeFixer (along with a Molex-to-Sata cable) from Noisemagic - Germany. I live in Denmark myself.
The VibeFixer only costs 12 euro! And shipment for both products cost 6,43 euro. Not bad. I'll report back on the product in terms of silencing, ease of installation, quality of construction etc. once I receive it.Edit:
Just received the VibeFixer so it's ready to be used. The rubber rings must be installed in a certain way before I can mount the HD. It's very easy to do if you're following the manual. The rubber rings hold the HD very firmly in place compared to my own suspension via elastic strings. Therefore, I'm not afraid that my HD will fly around inside the case if I accidentally bump into the case.
I can definitely recommend this product. I don't understand German so I simply used Google Translate to search around on www.Noisemagic.de