Comment 5 for bug 1476056

Thanks for reporting.

As mentioned in the comment above, borgbackup was synced from Debian and is available in Ubuntu 16.04 and later. (https://launchpad.net/ubuntu/+source/borgbackup)

I realize this is probably too late to be of any help, but regarding possible backports, please seee https://wiki.ubuntu.com/UbuntuBackports#Requesting_a_Backport.