I'm not sure where Auckland's original leopard tortoise came from, but the other one to make up the breeding pair was donated to them by a lady down in Dunedin (I think) who had had it as a pet for many many decades.
The tortoises in NZ are the Galapagos at Auckland (unavailable to private persons obviously), leopard, Hermann's, and spur-thighed (Greek). There used to be red-footed around (and maybe yellow-footed?) but I'm not sure of their current situation. There are also American box turtles which aren't tortoises but do live mainly on land.
Anyone able to add any others?