In the interest of keeping this great thread updated.
S-HSV kits available now from Coolingmist.com. Available in trunkmount, underhood, with or without stainless hose.
S-HSV (Super High Speed Valve) is a new product from Coolingmist that eliminates the issues of slower PWM pump style activation by using fast actuating valves. Vari-Cool is fully configurable including MIN, MAX and TUNE, Dutycycle and Curve. Free software and serial cable are included. Computer tuning is NOT required, but will allow for fine tuning.