1) If you're talking about the deactivated mecha knights that can be switched on, the answer would be Deconstruction Zones, although Ironclaw Munitions Factory has a few around as well.
2) If you're talking about the inventory ones, I'm pretty sure that all inventory drops are more or less randomised, apart from possibly co-aligned status vials (which is still just a theory, and might just be the RNG playing tricks on my mind).
1) If you're talking about the deactivated mecha knights that can be switched on, the answer would be Deconstruction Zones, although Ironclaw Munitions Factory has a few around as well.
2) If you're talking about the inventory ones, I'm pretty sure that all inventory drops are more or less randomised, apart from possibly co-aligned status vials (which is still just a theory, and might just be the RNG playing tricks on my mind).