The Internode Mirror contains a wide selection of software for download by Internode customers.
File Download Mirror Directory Listing
Index of /pub/debian/dists/buster/main/installer-i386/current/images/netboot/gtk/debian-installer/i386/grub/
Index of /pub/debian/dists/buster/main/installer-i386/current/images/netboot/gtk/debian-installer/i386/grub/