@HauntedOwlbear @wonka An alternative would be a military surplus store, or as they're called in germany here: US Navy Shops. The one here in my town only got two models of trousers (coarse and fine fabric, each in black or camo), but they have enough pockets, they're sturdy and comfortable, though I need a belt for them, and they sell the same models for over 40 years now.
My only gripe with them is that it is a "military" store and I'm a pacifist...