if you're gonna go custom, might as well not limit yourself to a specific brand and look at all the water cooling suppliers. For instance, for a buddy's build, we used the storm, with an AquaExtreme 50z, and a Maze4 gpu cooler. Yoad, im not sure how much it would cost, but places in Europe and USA ship worldwide, if its not listed, just shoot em an email and explain the situation.
Check out the sticky for more research on what the best parts would be for your particular setup. But yes, i would have to agree and say STAY AWAY from those Thermaltake kits etc.....