I replaced mine with a set of LED units I imported from the US that was made for the FJ Cruiser. Work very well. Try and look for a set of clear lenses and then get a set of 100W globes but definitely run them through relays. Visit some of the Landy shops as the defender uses the same size . 7:
You can't expect to be old and wise if you were never young and crazy
So ended up getting Autopal pirate golf 1 lights from dial a part for r250 for the set. Had to modify the light to fit the original bracket (breaking off edges and removing the adjustment screws) but fitted well in the end.