Before Harden even played an official minute in the NBA, James was rocking the Kobe 4 in Summer League.
Before that, Harden was even rocking the Nike LeBron 6 at Arizona State. After summer league, Harden wore the KD 2 and Kobe 6 briefly as well.
You can find the Nike Kobe 4 at StockX, Flight Club, and Stadium Goods.