Well, I just got them. The back of the obi's on Shock Wave and Surf Hits are blank. The back of Indoo-Express-Surfing obi lists 3 Surf titles. Just Surfing and Gone Surfin', those are on the list. Third one is new to the list:
All Down the Line [PCLP-00328]And it's Indo not Indoo. From the front and back covers:
Eastern Film Corp. Presents Indo Express