I've got the EK-FC570 GTX SE for Nvidia GTX 570 Reference Design - EN (Nickel) GPU water block for sale.
Note: this is the first revision (NOT Rev. 1.1) so be sure to check for compatibility.
I purchased this for my EVGA GTX 570 HD only to find out that I needed the 1.1 revision. The block has not been mounted to the card but I did connect fittings and tubing for a test run. Otherwise, this thing is pretty much new with all the original accessories (thermal pads, screws, etc.).
I paid $108 + shipping for it at Performance-PCs.com, your's for $95 shipped.
I accept Chase QuickPay and PayPal. I've got 500+ feedback on eBay.