Quiet fans with filters?

[flametank]

I was wondering if anyone knew where I could get some quiet case fans with built in air filters. I want to replace the fan that came with the Lian Li PC-60B PLUSII. The front fan does not have a filter. Is there also some material I could just buy at a hardware store and put in front of the fan?

 

[pengwin]

antec fans are good.

Filers. Look for panty hose, used dryer sheets...umm..thin cloth..