As stated above, Encores did the show a few years ago, with Chuck Cooper in the lead. A few years before that, BBC Radio broadcasted an excellent live performance of the musical. The Broadway revival that flopped at the Imperial starred Brock Peters. A film was later made with Peters, Clifton Davis and Melba Moore for Ely Landau's American Film Theater subscription series. The film was directed by Daniel Mann. I would not recommend the film, though; it is not very well done and its ending is wildly at odds with that of Paton's great novel, as well as the Kurt Weill and Maxwell Anderson stage musical.
Alan Paton was a great writer and humanitarian. His TOO LATE THE PHALAROPE is another great read. Done right, LOST IN THE STARS is deeply moving,. The endings of both acts are quite powerful.