Nick G,
So far I have not found it on PA2XPRO(same styles as PA800)

Based on Fran's analysis of it being Merenge...there are 2 Merenge's on PA...neither matches.

I would go to the Korg PA forum and ask...I bet someone has it.
http://www.synthzone.com/cgi-bin/postings.cgi?action=reply&forum=General+Arranger+Keyboard+Forum&number=37&topic=018500.cgi&TopicSubject=does+the+PA+800+have+this+style+onboard|QUS |

Lee