Yup, I need a new air filter, too. I guess I could order one, but $36 still seems a little steep. The stock filter looks suspiciously like your standard lawn mower filter. I'd have to guess that anything that works in a lawnmower's dusty environment would probably work well on our HD 200s, if it could be made to fit well. Wouldn't it be great to find something at Home Depot's outdoor equipment section that would drop right in?
Any progress to report on your experimentation, Fire Drake?
Speaking of air cleaner's, I have been riding in a dusty environment in Arizona this winter, every day a few miles on a dirt road. I have noticed that the dust swirls up from the front tire and is thrown high enough to enter the bottom air intake hole on the air box. If this only meant I had to pull out the air cleaner and blow it clean with compressed air, no big deal. However, I consistently notice a fine film of dust behind the filter -- Not Good, of course. The filter seems snugly installed in the plastic disc, but why isn't there a seal between this disc and the airbox housing?