Here's the filters I bought:
http://www.bikebandit.com/aftermarket-p ... 65+1177770
I actually followed a link that someone here provided to find them, but I'm pretty sure you aren't going to find them cheaper unless you buy in bulk. They're $2.06 each and it cost me about $6 s&h. I was changing the filter every other oil change, but now that I've found them for this cheap, I guess I'll change the filter with the oil every time. This thread reminds me that I need to change my brake fluid and fork oil, too. Anybody have any experience changing fork oil or should I just have a shop do it for me?