OK, i've kinda priced it up and this is what i've come up with:
PERU (Lima) - SOUTH AFRICA (Cape Town)
(LIM - CPT, Flight cost ~=A32,800)

That flight from Lima to Cape town is the killer!!!!

Try looking at Lima to Rio. Then Varig to Luanda and South African Airways
to Cape Town.

No need for Luanda. Just go from Lima to Buenos Aires and then take
Malaysian from Buenos Aires direct to Cape Town (the flight then
continues on to Johannesburg and Kuala Lumpur).