Apologies if this isn't the right place for this, wasn't sure where else this could go.. Basically, I have two 230mm case fans as intake and need to find some place that has 230mm filters to go over them to keep out the dust.. Built my computer 5 months ago and there's already a bit of dust buildup.. I can't spend $60 for any expensive ones, but I'm having issues just finding any.. I guess they aren't that common.. Anyone know where I might could find two of these filters?