need a replacement fan

I have never tried to do a replacement fan for a computer case. I think I may need to try to get a new one. The one I have on the side of the case has been shaking the case lately. I see nothing wrong with it. There are no indications that it is broken, I can't find anything in any programs that would point me to a trouble spot with the fan, but it has really not been working correctly. I have to stop it to get it to spin without shaking the case now. I have tried all the blowing it out with air compresser, all that stuff. I have tried suggestions given here in another thread. It is still doing it though, so that just makes me think I may need to try to get a new one and see if that fixes the problem. http://www.bjorn3d.com/2003/08/antec-performance-plus-660amg/ that is a link to the case I am using. If anyone could tell me the exact fan I would need to replace on the side door, I would greatly appreciate it. I don't want "a better fan" I really would just like to get a replacement of the same exact fan that is on there now. Again, I would really appreciate it if someone could help me with this.

 

Well to get the exact fan, we would need the make and model of that fan. You should be able to see it either on the side of your fan. There should be a sticker on it with this information.

But, on that note, you can get an 80mm fan from many places.

Top of the line: Noctua NF-R8 PWM $18
or
Bottom of the barrel: MASSCOOL FD08025S1M4 $5