Migrating another company's 1Password due to acquisition

Hello,

We've just acquired another company and are tasked with the effort of migrating their 1Password contents into our 1Password environment. I've seen instructions for migrating from 1Password 7 to 8, but that's not really what I'm looking for.

We need to get everything, vaults, users, etc. from their environment into our environment. Is there a dedicated migration system for this type of scenario? Or will everything need to be added to our environment manually?