42 -46 pick up different park lamps

[jdaley]

My replacement cabin seems to be different in a number of ways. Here we are calling it a US build rather than an Aussie build. The differences seem to be;
Fully lined single panel inside of the doors
Interior handle for the doors in cetrally located rather than near your shoulder
Roof seems to be a separate section from the back panel
It has tow swage lines across the back

And instead of the lovely flowing park lamp section fitted to the head lamp body, it has a stand alone praker lamp assembly about 2" dia with a brass slitted helmet over the lens. Unfortunately I am missing one. It all looks original and not a after thought.
Can anybody help identify it and perhaps help me find another lamp.