The outer white lens is the same as used on the conversion of the orange type used on 1986-1996 cars but the body was different on twin point cars and used a safety plug. The white lens if broken is moulded in the body but can be cleaned out completely and a new lens stuck in. New screws are XYP100310.
Often when the indicator bulb stops flashing owners suspect it is the bulb, only to find that the contacts in the base of the lamp have broken or squashed/pushed down too far. Corrosion does get the better of these lamps and pulling up the contact blades can often result in breakage so these lamps are budgeted cheaper so you can replace the whole lot. Uses
GLB344 bulb not included.