The original color of the radar disc in GTA III is black, but for some reason GSG decided to make it gold in the Definitive Edition, which just looks weird. 
So it's time to revert that decision as well by introducing: Classic Radar Disc for GTA 3.

Installation:
move the .PAK file into the Gameface/Contents/Paks/~mods folder. If the folder doesn't exist, create it.