The Internode Mirror contains a wide selection of software for download by Internode customers.
File Download Mirror Directory Listing
Index of /pub/ubuntu/dists/xenial-updates/main/installer-amd64/current/images/netboot/ubuntu-installer/amd64/pxelinux.cfg/
Index of /pub/ubuntu/dists/xenial-updates/main/installer-amd64/current/images/netboot/ubuntu-installer/amd64/pxelinux.cfg/