Thanks for all the help guys.
It turns out that there is only J Flex Plus tickets available and it will cost around R55,000 to upgrade. It is a bit much as we paid R49,000 for return F tickets to HKG recently.
Hoping to ask at the airport for an upgrade and see what happens. Are they generally decent or does it look like he is going to be slumming it in Y for this trip?
Thanks ao so much for all your help.