EVGA started selling a Hydro Copper waterblock for its X58 motherboard. You can get it on their website for $129.99.
Featuring a sleek-modern look and a full copper design, EVGA continues to incorporate only the best attributes that make up the Hydro Copper Waterblock Series. An extreme high flow path design with a unique E-Flow design keep your X58 chipsets as cool as can be and can drop the operating temperature by as much as half! Includes both hi-flow 1/2" and 3/8" fittings. Compatible with the following EVGA Part Number: 132-BL-E758-XX