I dunno about a wholesale PW theme song, but I found Nero's for sure.

[youtube]https://www.youtube.com/watch?v=QfM5rHH_xTs[/youtube]

I'll see if I know anything that might work for a total song.

Edit: I like this a whole lot.  Might use it for Frenzy Plant though.

[youtube]https://www.youtube.com/watch?v=tEPB7uzKuh4[/youtube]