It's similar to the Mighty Kong and the other cradles on the market, but Bill Forrest was the first one to come up with the idea. The stock long Suzuki arm is reinforced with square tubining and then you bend/weld this puzzle piece that welds the long arm. It connects to the short arm at the mounts. The bucket also ties into drum brake mount holes at the rear output with another piece which is not shown.
Rock 4x Fabrication used to sell the kit, but I'm not sure if they do anymore. At $100, it was pretty pricey for what it was.