A good place to start might be companies that supply service uniforms. In the US, per the Berry Amendment, they are required to source nearly all components and

A good place to start might be companies that supply service uniforms. In the US, per the Berry Amendment, they are required to source nearly all components and perform all labor in the US; the articles they make are consequently expensive and meant to be repaired. Other countries have similar legislation and the same result: more expensive clothing that is long lasting and versatile. One token of this emphasis on repair is, oddly enough, the button fly. Buttons are much easier to repair than zippers.