For others trying to figure out what to do, I went to
/var/spool/downloads/content and ran the following command:
wget -nH -r -l 1 -A zip -np http://archive.outernet.is/
-nH puts the zip files in the current directory (instead of creating a
-r makes it download multiple files recursively.
-l 1 keeps it to downloading just one level.
-A zip tells it to only download the ZIP files.
-np tells it to never go "up" in directories (though this shouldn't be a problem here).
This will download everything and after a few minutes will show up in "Updates" on the Librarian. From there, you can add them to your library.
If anyone has any tips for only downloading new ZIP files since the last download, it would definitely make things more efficient and be useful as a temporary backup if a satellite dish is down.