I am afraid that I will have to leave all of the many jokes that come to mind for others. Not sufficiently challenging
McMaster-Carr sells torlon (aka polyamide-imide) balls in small lots (bags of 50 for the small ones, 15 for the larger sizes). They have sizes from 1/8 to 1/2 inch. I don't know the details for having them shipped to
Cape Town.
McMaster-Carr
Type "torlon balls" into their search
engine.
Good Luck!
Mike