I have picked up your post via the app. Sylvia is quite right, you are on the wrong board.
I have had a quick search on the NA Discovery pages, no success. I would suggest you contact them before you go. They will be closed for the holidays and there are some protocols to be followed, what you are allowed to take with you etc.
Here is a link to an emigrants page, which may help.http://www.nationalarchives.gov.uk/reco ... grants.htm
If you haven't already done so, can I suggest you try 'Rootschat.com' they have a dedicated South Africa page.Make sure you use the correct board though!