Unfortunately this mod will need to be put on hold. I contacted a City ford as it is close to work and i could not wait till the weekend to pick up the parts, and they advised that they could not find the part i was looking for.
I told them i just spoke to strapp ford and they had the parts, they insisted that as far as they could tell it was a sealed unit, when i questioned what would happened if one of the globes burnt, how could i change them, they asked me to get the part numbers.
I called strapp ford again and asked for the part number and explained the conversation i just had with city ford when the bloke decided to tell me that when i spoke to him the previous day he was quoting me tha AU part prices as they did not have any for the BA yet.
So will need to wait until these become available in the near future to find the outcome.