Buy all the piecies and build it from there.
Is this what your saying? Just making sure
Yeah that's what I'm saying. www.dangerden.com
will have everything you need.
Your idea doesn't seem half bad. You will probably get decent results if you go through with it. Definitely like to see it.
But yeah go to danger den. You need:
Coolant (unless you want to use distilled water inwhich you'd still need to add anti-freeze, anti-rust, anti-algae kind of additives to the water)
That's the basics of course, and you can always go more with a chipset block and/or GPU Block