At the risk of prompting another sense of humour failure allow me to suggest this training establishment. It is not at Lanseria but situated at a smaller, equally convenient airfield called Grand Central or FAGC.
Pilot and Flight Crew Training School | Grand Central South Africa
They have a mixed fleet of aircraft and use the Twin Commanche for twin training. It's far from being a glass cockpit but you need to know how to fly to operate one safely.