How about -
SpareSafe – VW T5/T6 California Spare Wheel locking Device (inc Security Wheel Bolt) SS1 – Everything VW California
Similar systems available on the bay, uses standard VW security bolt but the head is shrouded to prevent mole grips or similar
Yeh think this is what I'm going to have to shell out for. Is what I recon I was going to get before I now have to shell out for a new wheel...
If only I was made aware of this being an issue when I brought it, it would have been sorted a few days after getting the van...