Need some advice...
Jeep was going for retest today. Failed on emmissions ( think there ok now), Failed on handbrake ( adjusted) failed on 3rd high level brakelight inoperative.
On Saturday i took the high level brake light off to replace the bulb. Trouble is, there is no bulb

and there is no housingn behind the exterior light....and it doesnt appear as if its been removed ( why would it be)
Seems that the brake light has only " cosmetic" use.
Went to two scarpyards and dismantlend the trim to get to said part - only to find them exactly the same......
Jeeo - invariably - wont be able to supply the the part given their record!!!Ebay and google show up nothing...
So.....can i just remove the whole trim part and not have the third brake light......is it like a spare tyre, i.e if its there its tested and if not its not?
Thing is i need thi on the road and if i dont get it in today i will need to pay for a re test but at the same time i dont want to appear a smart arse and pi$$ of the MOT man by beating him on a technicality

Thoughts ?