Here it is right from Sooner's web site:
"If you own a tractor which was originally sold new in Japan, then your tractor can probably be classified as a japanese "grey market" tractor. We currently offer aftermarket accessories that will fit many of these tractors.("Unversal" items such as 3-point hitches, compact tractor seats, toplinks, and more.
HOWEVER, WE NO LONGER SUPPLY THE PUBLIC WITH FACTORY PARTS FOR GREY MARKET TRACTORS. "