Hi lili5689, I've no idea what other CPU fans might fit your laptop. Certainly putting the model no in to eBay brings up fans for it for sale.
Couldn't say if they would be any quieter than the one you have. Possibly if the fan you have is worn out and rumble and grumble or the bearings are damaged and you replace with a (nearly) new one.
Maybe try oil or WD-40 in your existing fan and see if any better, if is then maybe worth replacing as my experience is oiling a fan helps but not for long, days or weeks at best.
Regards, Seb
What cpu cooling fan is compatible with Sony VAIO VGN-CS16G?
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