It would be cheaper for you to buy one off E-Bay. There was a complete filter/adapter kit on there for $70. If you shop around you may be able to find something cheaper. I just can't compete with the prices on the stuff.
Most all the filters are going to be like the UNI I posted. There are K&N and Pro Design, but all of them use an adapter for clamp ons. Usually a 3" mounting hole. You can get the same brands for the stock style mount as well. In my opinion the clamp on with the aluminum adapter is the only way to go. Plus with the clamp on you can run without the lid. With the stock style you cannot because the tabs on the lid are what hold the filter sealed against the air box.