They are on the disco I as well.
As an alternate approach:
You can get 3 series III or 90/110 lug nuts for the stock wheels (not the allot type as they are different) and screw then on the 3 studs, then use 3 more or some of the alloy type lug nuts to synch up the spare.
Uncle "Richard" Douglas has a Land Rover with big wheels that never gets stuck... until he breaks something so it won't go. Uncle Douglas always breaks something. - Anna Crowther at the Conclave 2012 (AKA Carburetor Neck)