I have updated the page with the opening and closing theme music for the 12 seasons of Classic H50:
http://hawaiifiveo.tv/music/
(Yes, this is another way of accessing the site...)
I decided to just take the closing music from the DVDs, because it was unlikely that there would be a substitution like there was with some of the opening credits.
There are links on this page which lead to some interesting places (with more such places to come)!