What is up with your lower shock mount. An extension that turn the mounting bolt 90 degrees.I can confirm that the navara D40 eBay rear sway bar kit does fit the USA production trucks (at least with a M226 anyway)
It made a noticeable difference in handling, much improved.
Cost is about half of the hellwig unit and no drilling or welding! Very easy install, took maybe 20-30mins, but the instructions are non-existant.