The SE File Tracker is always kept more or less up to date. The megapack started as a torrent file, and Romulus started uploading it to filefront at some point.
http://kazharii.no-ip.com:6969
I keep the torrent with each shipset in its own archive. Provided that you keep the archives around, you can just restart it with the new torrent when new ships are added, and it will automatically just get what you don't have.
Hmm... what is this 13th set? I've only got 12 on SEnet.