$139 for one, $159 if you're a chrome whore. Yep, that's expensive for a used bike but not bad I think for a new one. P.S. Don't you have SOMETHING to do FOR work?
Ok, that first link I posted was for very expensive reusable filters...but here is another idea that is cheaper and sounds like a damn good idea to me. Looks like the one that would fit our filters would run around $41http://www.shopfiltermag.com/filtermagcommercial.php