Welcome to the forum.... must apologise i did see your post and knew of a contact in Suid Afrika(sp) but forgot to look up her email for you. Due to circumstances,(mainly my slackness), i haven't been in contact with her for awhile.
Linet Stockdale is a name of the person i have been in contact with there. There is a website she provided me with of a company that deals with organic agriculture. That site is http://www.jains.com , apparently they are an Indian company expanding into South Africa.
You can also try OAASA (Organic Agricultural Ass. SA) and see how you go.
I am reluctant to give Linet's email without her permission, so i will contact her now for you. That way she may be able to give you more of what you are after!
Not sure how helpful this may be for you but worth a go!
Township of Boonah (pop 3,000)
2.7 acres of gently sloping volcanic soil
"Progress is a spiral; the pendulum swings back as well as forward. The new postindustrial world, for which many of us are striving, will see an ecological renaissance".... Rober Hart