Meanwhile I've asked our main supplier, who also have industrial cabinet assembly service.
I asked for 500 pcs of each various color and AWG around ~60mm with A: ring M4/5 B:tinned, they've quoted around €0.80-0.90 per wire.
Total 7 different assemblies 3500 wires for €3k.
They didn't want to tell if they owned the equipment for this, or asked another company.