I think there are plenty of sites where you can find a replacement cooler. Blue Orb is one popular product, But I'm pretty sure that is better for users who want more cooling performance and don't seem to mind the speed. There is another called "lasagna" which if you can find, is supposedly much quieter.
On my radeon, I replaced the heatsink, used arctic silver adhesive to attach a new one, and I'm hanging a 60mm fan next to it. The new heatsink isn't more than 3/8" tall, but is much better then the one that was on there. The arctic silver adhesive will do a much better job than the glob of glue that I found on there. And the 60mm fan will actually move air, and not produce much audible noise, since I have it connected at 6 volts. If you take one of thopse PCI slot covers and bend them straight, screw them in, and hang a fan on the end, you get a fully adjustable fan, hovering right over where the heatsink is.
I don't have a GF3. I understand that they require more cooling than most other cards, so my exact method may not apply to you. But, you might want to consider retro fitting something on your own, because noise doesn't seem to be the concern of most manufacturers. If you have room for a bigger fan, and can run it with a simple 7V connection then you'll be in business.
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