The LEGO Group has already created gold C-3PO minifigures
▻ Everything about C-3PO ... - HOTH BRICKS
Just purchased with great luck these two US and European variations of Lego Chrome Gold C-3PO minifigure in like new condition from private collection. : r/lego
C-3PO Droid (Gold Chrome) - Custom Star Wars Minifigure – The Brick Show Shop
Details about the 5 Solid Gold Lego C-3PO minifigures given away by Lego. Where did they go? - Minifigure Price Guide