The Mechanicum has a new batch of bots to help it advance the machine logic. Check out the Ursarax Cohort up close!
Didn't we just see these? Sort of. The Heavy Support of the Mechanicum is rolling out on a new EPIC scale with Legions ...
Plastic 30K Mechanicum units may work as alternatives ... I don't own any Mechanicus tanks, but from eyeballing it, the Triaros Armoured Conveyor looks to be a similar size to the Skorpius.