I just came across this documentary on the famous Light Bus from the Woodstock festival. It is part resto part social significance of the kombi, it is worth a view. It is free if you sign up for a 7 day trial - just cancel after you watch this and any other docos that may appeal. It is probably also on download or torrent sites but, hey, if it is legally free somewhere then just do that. https://curiositystream.com/video/2137