There are a number of Gladstone based Kart dealers. They include:
GJ Karts https://www.facebook.com/GJ-Karts-Growler-Race-Engines-1656873174594440/
City Karts Gladstone https://www.facebook.com/citykartsgladstone/
Two4Tuning https://www.facebook.com/TWO4-Tuning-181971078662462/