39 Rear Lights and Stop lights.

[Phil Gillespie]

Jus put my 39 coupe through for its 6 monthly WOF check here in NZ.
It was noted that one rear light was dimmer than the other one.
Seems the contact spring loaded contacts in the lamp holder are not making a good contact due to weakness in spring in contact.
Just want to replace the lamp holders only not the complete rear light.
Can these be had? Still running 6v.
Being RHD vehicle wiring is run along RHS to rear light RHS and then across rear member to LHS rear light. Three wires cross the rear section.
These will be? 1: supply to lights and number plate. 2: supply to stop light.
3: ????
Thanks Phil NZ