Here it is, I went and grabbed the link
it's not quite Howard Keel's honey-rich baritone, but hell if it ain't close
https://www.youtube.com/watch?v=jWzqcele1tY
There's a clip floating around Tumblr of Tim Curry doing the Pirate King number. All his trademark manic energy BUT ALSO
1) holy wow was that man ever a looker, and
2) his baritone was LEGIT, who knew? because I didn't.