Over the weekend I found the Danger Den TDX my druron melted the plexi top of and decided to make a GPU block out of it. The barbs and screws were pretty cheap, under $5 and PVC is VERY easy to work with
My naked 8800GT:
Block tapped and ready to be drilled for the block & card:
And a shot of it on my GT: (still need some springs and RAM coolers)
Also, these arrived today:
Two old spiral blocks set up for 1/8 NPT fittings. The full copper one is pretty heavy and I got these pretty cheap too. Thinking of maybe making one into a north bridge block but I'm not sure if its worth the flow loss or if I'd even get flow loss.