Provide contents on token create

I’m looking into what to do if you need to setup Vault anew, but without having access to consumers using that same Vault. So a token was distributed at some point to a closed system, but the machine running Vault, for some reason, would need to be replaced and “recovered” to act as before.
Simply put, I need to reuse an existing access token on a new Vault (meaning new unseal keys as well, etc.).

From the docs it seems not to be possible at all, but does anyone have ideas or knowledge on ways to create tokens where you also specifiy the actual token contents?

Alternatively, in my case I would use Docker, any other thoughts or ideas on how this could be achvieved. My only thought is that one could copy the entire working folder of Vault, but I would be surprised if that didn’t also cause issues.