I know what you mean: my stepdaughter keeps talking about a car, and she's only 15!
The DD block is $45, the DTek is $36, and the Innovatech is $39.99 .
I'm going to add the DTek Sidewinder, just because it's less restrictive:
It goes for 37.00, but it'd have to be epoxied, because there's no mount.
Speaking of which, one could also get a cheap NB block, and epoxy it to the GPU.
For the ramsinks, I remember reading somewhere about someone cutting his own with a hacksaw, out of 1/2 fittings. Cost: a buck and a half.