In case you get no replies, you could go outside the box and look at Facebook.
I see three Conne names, all in South Africa - a Desray, Bruce, and Ian.
You can message them privately, explain who you are, etc., and perhaps they
can put you in touch with the people you are looking for.
On Apr 25, 2013, at 10:41 PM, email@example.com wrote:
I would like to make contact with Samuel & Patricia CONNE (formerly COHEN)and/or Samuel or Reva CHAIT. I think that they live in Cape Town or its vicinity.