Arthur, recently I was in NZ and purchased Whitworth sockets from Hayes Store in Invercargil. The sockets are made by Kokon which I believe to be good quality. They had them in sets but as I only wanted sockets themselves I purchased loose ones, a set of 3/8 drive and a set of 1/12 inch drive. Hayes had a huge range of tools and a full assortment of Whitworth sockets, impacts, long, etc. The price wasn't too bad and the exchange range at the time softened the blow a little more!
Cheers, Mick.

