What fan does a NVIDIA geforce 9500 gs use?

my girlfriend's computer has been making a rattling noise for about half a year, and we're kinda getting tired of it. so we opened up the case and looked around for the issue and saw that it was the fan on her video card vibrating. it's off it's kilter, unstable.. etc. pretty much, we need to get a new fan for it. but neither of us know anything about buying tiny fans for video cards... can anyone point us in the direction of what fan to buy as a replacement? we've looked around, but can't place our fingers on ONE fan, that WILL work. lots of them look good, but we don't know which one to pick, if the screw holes will match up and so on. so, any help anyone can provide would be greatly appreciated. thanks!|||Its Hard To Just Get The Fan Because Very Few People Change The Fan Them-self However You Could Replace the Heat-sink Would Be Simpler But If Your Are Not Sure What You Are Doing Inside It, It Is Best To Send It Off To Be Repaired By NVIDIA Would Be Best As They Have All The Parts At Hand Also It Wont Void Your Warranty If You Have One