Check this out, load of them. But this seams to be the only page working at the moment http://www.modderz.net/outlets/index.html
im not an expert on liquid cooling, but www.DangerDen.com has some really nice kits and have a lot of review links
the best kit i think is the Swiftech one. But to be honest you better off mixing and matching. Egg Dangerden - Maze 2-0 Eheim pump 1046 Dtekcustoms - Cooler core and some tubing This should be more to overclocking possible *shug*
Burntfire the best thing to do is read around in the forums, and decide what you want then go here. http://www.modderz.net/outlets And decide whether you want to order from the us or not and the ones with a tick under "water" see water cooling gear