OK, back to the subject of Skyhawks.
They are still operational in the Argentinian Air Force (A-4AR, delivered 1995-1999... surplus USMC A-4Ms modernized with a New-Zealand-like APG-66 multimode radar upgrade) and the Brazilian Navy (AF-1, delivered from 1998... modernized ex-Kuwaiti A-4KUs built in 1976-78, and themselves a modified A-4M).
And the AF-1s do operate from the Brazilian carrier Sao Paulo (ex-Foch, French Navy).
Argentine: 32 A-4AR, 4 TA-4AR (two-seat trainers)
Brazil: 20 AF-1, 3 AF-1A (two-seat trainers)
So either nation could buy New Zealand's A-4Ks & TA-4Ks, if they wanted to.