I usually have to head to the shop to drill new mounting holes and cut it to fit. I find replacements at newegg.com or geeks.com
I was experiencing some ridiculous noise issues with my computer, and I was beginning to worry about what might be causing the problem. After opening it up when it was turned on, my first conclusion was that it was one of the three main fans making the noise. But after moving my head around a little bit, I noticed that the noise was coming from the graphics card's fan. I couldn't believe it, because it was SO loud. The noise it was making sounded like there was a piece of tin foil stuck in the fan mixed with a school bus at a red light. For a while, I kept thinking it was the fan on the motherboard, because of all the metal stuff below it, and it sounded like the fan was scraping against that. But it's just the little fan on the graphics card.
I took out the card, and vacuumed off the dust from all around the fan, but I couldn't do anything to actually take off the fan and fiddle around with it (It seems to be held in by these plastic bolt like things that you can't take off). I noticed the fan felt a little loose; you could spin it around with your finger, but you could tilt it up and down by pressing on one of the blades. The fan still makes the noise, but it varies between the usual noise, and this noise that sounds like a regular fan that's struggling to stay spinning. So what should I do? If the fan eventually breaks, will that be really bad? I really don't think I should have to go get a new graphics card. I just don't know how I could fix this myself.