From Bandai, released as a 1/144 High Grade model kit is the Mack Knife from the Reconguista in G anime series. Reconguista in G takes after the events of the Universal Century story line. As an added bonus, the production is led by Gundam creator Yoshiyuki Tomino.
The 1/144 High Grade Mack Knife is selling for $14.84 at Amazon
Construction Manual & Color Guide for the HG Mack Knife was translated to English from the Japanese manual posted at Dalong's Gunpla & Model Kit Review site.
Paints Used & Paint Conversion Equivalents: