sorry I was able to download from that link. Must have been trying an older verion earlier.
Anyway, I've installed it, but the ownership on the installed files cause errors:
sudo: /opt/bin/sudo must be owned by uid 0 and have the setuid bit set sudo: /opt/libexec/sudo/sudoers.so must be owned by uid 0 sudo: fatal error, unable to load plugins
They are owned by bin:bin. It also changes ownership of /etc /var and sub-directories to bin:bin