Don't laugh at this quick fix but...on the move to Twyning today to stay with a friend (with a factory visit on the way ) and then on to France in my black 4/4 and following comments re hidden 3rd brake light issues in France I removed the cyclops and using a connector as listed in previous thread I fitted a 24 led "stop" light from ebay...only 5 pounds!!!!
It will do till I find a similar vintage light.

Regards