Those blocks kick ass. You can have them with 3/8" and neat retention mechanism. They beat just any other waterblock on the scene, including Maze2.
You can find the links to german sites in this forum, under WB roundup topic if my memories are right.
The res shown above can be found at:
http://www.pc-mac2000.com
The owner is a cool dude, i had no problem ordering stuff from him, he answers the phone and emails, and speaks both German and French (i don't know about english). He warns you about delays as well...