Why not just buy another cooler? I doubt you will find them for sale being such an old cooler, you best bet will be used and ebay. The cooler was a very poor one when it came out, no less compared to current coolers you can get.
It fits the board, it fits the look, it does the job for what it is on. In short, aesthetics. If this system needed better then it would get better, as it is, visually appealing (which is purely subjective) takes precedence.