"Tintin in the Congo" is available from www.amazon.ca in English, 2005 printing. Also available in "Adventures of Tintin" vol. 1 (2007 edition) and in French as "Tintin au Congo."
It was written in 1930 when the Congo was Belgian (the author was Belgian) and is the second in the series.

The DVD set vol. 1-2, "Les Aventures de Tintin," 2005, is composed of selected stories; Tintin au Congo not included. Tracks in English and French, subtitles in English and French.