One of my contacts can now get AirRunner kits, not really cheaper but basically $100 for shipping for ANY number of kits. I paid almost $300 shipping for mine from the mainland for my single kit. Any AirRunner kit for any car/model as long as its for Hawaii. The dropship point is Oahu so neighbor island peeps might be slightly more. He is too busy selling AirRide etc. but he is willing to help Hawaii peeps, he mostly deals with trucks. PM me any advertised price and I will forward it to him and see if he can work with you.

Peace