So i was looking here
http://forums.sohc4.net/index.php?topic=63092.0 and liked the simplicity behind the way he made an airbox/airfilter. Could you do one better and cut the entire back off (Or, an appropriate amount) of an airbox and put a filter medium over the hole? You should still get the drop in air pressure inside the box... but you wouldn't see the air filter at all. You could probably do this with the filter material on a stock filter, if you used a stock filter, you'd have the correct amount of surface area to work with. Thoughts?