Only the notes and accompanying questions from the companies that used to run the ground courses.
These included Babcock at FAGC Avex Air at FALA and FTS at FAGC. There is a school at FAGM that trains to ATPL standards and then there was the one at George whose name escapes me.
You probably have to buy the course to get the questions but you can't really swot for the exams without having done a considerable amount of hard graft.
There's also a website for South African pilots. The name is a combination of the words aviation and communications. You might find some useful information on that.