Roof lights

[Hawssie]

I have a 1969 1 ton truck that was a few years ago partially saved from the scrappers. It was a cab and chasiss that someone had lengthened the wheel base by cutting the frame. Anyways to save space (and most of the truck)the frame was cut off at the end of the cab w/ the bed and scrapped. I did save the rear end. The rear end is an Rockwell (pre 14 bolt I guess) I was thinking about reviving it and my question has to do with the factory cab clearance lights. These seem to be pretty uncommon. Does anyone know where I could source these? The roof is actually formed to for these unlike the later model body styles where they are flush mounted and can be added or removed to any roof. They are round cup like with a flat top (not bee hive). Any info would be appreciated!