Thanks everybody for the thoughts on this thread. I need to study up and revisit, in a bit. I did find ... deep in the innards of Land Rover's site ... the guide sets for different options:
http://topix.landrover.jlrext.com/topix/content/document//lookup/select?groupId=181&cat=OWNER
Has booklets with line drawings of all these (this is the list for DII):
VUB502660/501270-530 - Nudge Bar - Wraparound
STC53194/VUB500520-600 - Rear Lamp Guards/Rear Bumper Lamp Guards
STC53193-556 - Front Lamp Guards
STC53181-578 - Lamp Guards - Nudge Bar
STC53179/80-585 - Modular A-Frame
STC53175/76-583 - Modular Wraparound
STC53174-592 - Protection Bar A-Frame
STC53173-591 - Protection Bar - Wraparound
STC50061/50168-545 - Body Side Mouldings
STC50040/60-579 - Graphic Protectors
STC50038-581 - Multi-Height Adaptor
STC50026-557 - Front Lamp Guards
STC50022/23/24/25-588 - Nudge Bar - Wraparound/Nudge Bar - 'A' Frame
STC50021-595 - Protection Bar A-Frame
STC50020-594 - Protection Bar