Sorry I haven't been contributing much. Work has taken over a bit.
Have been watching ebay, Gumtree and the like but nothing has turned up yet.
The wheels posted above are the ones - black with diamond cut face.
The wheels are not generally stocked by dealers and the distributor in Aus has promised to let me know if anyone orders 2.
The Advan Locking nuts and the The Mc Gard lcoking nuts posted by Mat are supposed to be amongst the best. 1000's of combination of keys with minimal visual difference in the pattern on the nut.
The Mcguard site Vehicle Application Guide - McGard: Innovative Security Products has a guide for selecting the right product.
You don't have to go to Ebay or online to American sellers for Mcgard nuts .
They are available in Aus from Wheel Wharehouse phone Craig 08 8295 1033.