My dad buys them from Napa, and he gets them for like 3.25 apiece. Probably helps he gets a discount considering he is in there all the time, but IDK what the originaly price is from them. They do carry them right in stock though, as that filter is probably the most used filter around for quads, considering it fits a lot of different Hondas, and Hondas are more populated in this area. They look exactly like the OEM ones from Honda. I just pick some up everytime I go to Honda. They are pretty cheap there, I usually get 5-10 at a time, plus quite a few for the 450s.
2008 700xx; Power Bomb header with power core 4 exhaust, Power Programmer III, pro armor nerfs, prm products control front and rear bumpers and full skid, 10" ITP rears, ITP Baja's fronts, RZR 2's all the way around, Uni filter, 13t sprocket, CCP steering Damper, DS450 shock swap, Dual Gasser Throttle, bar risers and Moose barkBusters. 730XX kit plus other engine mods!