What DB was used to hold the old site? Did no one run a dump?
I put a copy of the Linux scripts I use to backup my MySQL DB here:
http://matureasskickers.net/ftp/Misc/DBbackup.tar.gz
One script does the backup, and the other invokes it from cron and scp's the result to my home server early every morning. Each backup has the timestamp in it's name so they don't overwrite each other.
You could also incorporate a couple lines to "svnadmin dump" your Subversion DB and send it to the offsite server.