New Scorpion Band may not have brought out a CD which is purely shanties and / or Pirate songs, but they have one called 'Out on the Ocean' which is full maritime-related material (and it's not new - it came out in 2005). Details of this and all their other recordings are at http://www.new-scorpion-band.com/pages/record.html

Quite a bit of their music features in various TV progs and film soundtracks including Sponge Bob