I believe the question was whether there is an importer for the Long Ranger tank produced in Australia for the JK.
http://www.thelongranger.com.au/jklongrangefueltank.html
I can't find a reference for one, and frankly I doubt there is one, but the best bet would be to contact the company directly and ask. They would know.
With the exchange rate on dollars and the import duties, the Aussie tank would probably be priced out of reason.
Local US companies that make tanks for Jeeps would be a better bet. TrailQuest makes, or used to make, a heavy duty tank for the TJ, and may have one or be working on one for the newer models. I have a TrailQuest 22 gallon tank on my CJ7, and could not hope to find a better fuel tank. The bottom of the tank is 1/4 inch thick, has never had a problem with hard contacts with rocks, and I have several times jacked up the rear of the vehicle by lifting against the tank. And, it came configured for fuel injection, with a pump ready for installation. It is worth looking.