I have a SCP Air Box that came with their Fresh Air Intake Kit. I also have a 3" OD tube but this is home made and not from the SCP kit. Also have a 4" OD cone filter. Filter is squished a bit but fairly clean and is a cleanable.

SCP Air Box $40+shipping
Tube $15+shipping
Filter free+shipping

Airbox and Tube 50$+shipping