Richard : Thanks for your input. Yes, I am well aware of the early Cougar's padded console, and the longer "light tubes" that were used on them. I found that these tubes could be used on our Mustangs as long as a spacer was provided. I actually made a few of the "Four hole spacers" from an aluminum bar, in order to try them, and they worked perfectly if installed on the back of the panels.
As far as the bezels, I actually have plenty of them. Over the years, I've been lucky enough to come up with original "PARK", "BELTS", and Red "FUEL" Lenses, and a Blue "DOOR" Lens with Bezel and Light Tube, but the Blue "FUEL" lens (which I need for my January 31 car), has escaped me. I have even looked into having the lenses made, but none that I have contacted have either wanted to, or been able to, make them out of such a thin material. The thickness of the lens is limited, as the depression in the Bezel must accommodate the lens, and still have enough "meat" left to "stake" the light tube onto it.
As far as the old, and long, thread on the Safety Convenience System, I started putting together a comprehensive "summary type" Article a couple years ago. I am still working on it "off and on", in order to help others "down the road". It will include "History", "Details/ Differences", "Part Numbers", "Part Availability and Options for Parts", and "Trouble Shooting". An ongoing Project of mine for sure.
Bob