Those are great products:
dangerden Maze3 (
www.dangerden.com)
Aquacool CuPlex (
www.aqua-computer.de)
Cooling Solutions K4.1 (
www.cooling-solutions.de)
DD ships internationally and quickly.
Aquacool and CS ship in Europe for sure, i dont know about International. Ask them

The K4.1 is the top performer according to a bunch of round-ups published in Europe...
(ps: you'll want to use babelfish to translate german sites...)