@Chris You might be able to run a virtual machine host on Windows 7 Pro and then run this mirror instance as a VM. Most likely you’ll want to run Ubuntu 16.04 desktop or possibly a version of Debian. @akshaybahadur21 will have the details as to which one.
At work, we use a Debian 9.1.0 installation for slimmed down testing. It doesn’t take up much memory or resources at all.