Far as I can tell, someone wrote:

About 16 feet or so. It has to have a VERY
shallow draft - maybe 12 inches or less. I'm interested in a
"comfort" boat, not a fishing type boat. And, it has to be around
2000 pounds or so to be towed by my Wrangler. A few years old is fine
and I would pay 10-15k.

Maybe this is whjat you want...

http://www.airboattrader.com/AirboatsForSale2.htm