hello so i have a cpu cooler thermalright macho b and its fan died or dieing cuz its work just max at 400 rpm instead of 1300(unplugged dvd cable hit it couple of times during work ), anyway is there a way to buy this fan alone anywhere or iam forced to get new cooler ?http://www.thermalright.com/product/ty-147a/ or is there any replacement i can get instead of this 147 one? for 7700k and asrock z270 fatality k4,