Old ERPNext VMs?

As the title says, I’m looking for older erpnext VMs.
I have two erpnext instances running on v6 and would like to slowly bring them up to the latest version.

It would be great if someone could direct me to location where I can download the older VM versions.

Thanks in advance.

You can build your own VMs with the steps mentioned in ERPNext VM Builder docs.

If used as is the VM setup will contain the most stable version of Frappe and Erpnext, i.e. Version 12. But you can change the arguments to the install script to setup desired version/branch.
https://github.com/frappe/bench/blob/develop/vm/scripts/debian_family/install_erpnext_production.sh

Easy Install Script Documentation for reference