Missing Music From Endless Summer II

After reading the other old threads on here, I realized that I am not he only person who has been searching for some of the music form this movie.

You can obtain all most all the tracks used in the film by purchasing the following 3 albums:

The Endless Summer II soundtrack, by Gary Hoey
The Spirit of Surf by The Sandals
Ocean Surfaces by Tom Curren

There appears to be other music used that was not released that I'm aware of. I am searching for the following tracks, as are many others:

-The song used when Pat, Wingnut, and Robert August are surfing in Costa Rica at "Playa Negra"

-The Song used when Pat and Wingnut surf J-Bay. This is also used over the closing credits.

I have heard these incorrectly called other tracks, but they remain unidentified. After 15 years of going crazy wanting to know, I have started to poke around. I contacted the rep for Bruce Brown Films who did not have the answer. they directed me to the producer and the music artists, so I am heading that direction and will get back to you.
Anyone else have any other info?
thanks!