I am doing research on a Faber family in South Africa, which is not related to John Baptist Faber. However, I've just came across the following Death Notice that may be of interest to you:
Charles Robert John Faber, South Africa, Electrician from Ulco, born 15 April 1947 in Kimberley, died 12 April 1970 in Kimberley. He was unmarried. Son of John Baptist Faber and Anna Francina Faber. His father identified him, thus JB Faber was still alive and living in South Africa in the 1970’s.
It is the only information that I have. If I do come across more I will let you know.