I wish I can read german. But I can't seem to find the ld10 tube in the english version either. Thanks anyway.
I managed to get it by cut and paste sections into Google Translate. Pretty accurate I say.
In a nut shell, there are 3 tubes on that site. ld10, ld20 and pd20. They are each Eu21.90 - 16% (no VAT outside of EU) + Eu4.90 shipping = Eu23.30, roughly = US$30 (exchange rate at 1.3), then add 3% foreign transaction fee from your credit card makes it around US$31.20. That's assuming US Custom does not assess any fees on the item.
It is up to anyone's value. $31.20 for the tube/switch/clip or buy a complete light at lightjunction.com with 20% discount.