from what I understood that is an add on to the stock heat sink. Can't you revert to the old passive cooler??
If not try Ebay, there are plenty of sellers out there. Thermaltake, Coolermaster, etc...
it gets far too hot without the fan and I have already checked ebay and googled the living heck out of the part number and board. I was kinda hoping for some sort of direct replacement since I'd rather not remove the board to screw in a new one.
With all do respect to Diego I seriously doubt you will find the solution via support page.
However, would you define what you mean by far too hot? any OCing on your platform? XMP profile active?? is the case properly ventilated?
In case, you didn't reach a solution with the support page. Then you will have to remove the board to replace the cooler. At least, this way you will get rid of all the dust accumulated over the yrs