The hour requirement is dropping all the time. Remember, it is a cadet scheme, supposed to help the PDIs, not those with enough get up and go to get some hours themselves.
Having said that, until you find the PDI with a real desire to fly, not just get a job, the hour limitation is purely academic for them. The problem with people with a few hours (50-100) is that they are then streaks ahead during the initial part of the course, but they still have to do all the stuff again. The course is designed to deliver all the cadets to the same point in flying ability at the same time. Those with some experience on joining have an unfair advantage on the others.
There are plans for two intakes a year from next year, but the selection process is a long one. Just download and submit the application form, and wait.
David, your problem is that you have to sign on the dotted line your CV. If you fail to disclose your hours, that could be constued as fraud, and you'd be unlikely to work for SAA thereafter.
You would probably be caught out at any one of the following checkpoints: interview by the Flight Ops people (the other interviews are done by HR, so you could probably BS your way through those), the flight assessment, done by the Pilot Instructors, or possibly somebody just recognising your name.