90 days is today but the web site is not taking it yet - hence my question. It may well be that the 90 days is local for departure (JNB at 1800 local).
my extensive experience from JNB both travelling and booking other pax is that to PER on the code share, or SYD are as rare as finding a hens tooth in a pile of rocking horse sh!t so I wish you well!
booking 3 months out on paid J it was not unusual for us to be waitlisted on the preferred flight home every time (yet funnily enough we never had that problem flying into the country!)
would be interested to hear if you have a win