This mod allows you to produce reinforced barrel by yourself. Although it's expensive, you don't have to be controlled by others, produce as much as you want.
Improved version: https://steamcommunity.com/sharedfiles/filedetails/?id=2570273747
Make Reinforced Barrel
WorkAmount: 9000 (Time required for one and a half components)
Cost: 150 Steel 2 component
Minimum skills: 7
Market value adjustment: 600→500
