I believe he is the only one alive now castwise
Glynn Edwards- who played Corp. Allen- is still alive:http://www.imdb.com/name/nm0250022/"Oh dear. How sad. Never mind!"
Does Chief Buthulezi count?
^And that Zulu kid in the hat.
Quite a few of them are still alive, actually. David Kernan (Hitch), Glynn Edwards (Cpl Allen) and Richard Davies(593 Jones), to name but three.
Also, let's not forget the Zulus!Mangosuthu Buthelezi (Cetshwayo) is still alive, and I believe still serving as an MP for kwaZulu Natal.