And you did not think about the ceiling?
I was thinking about the rattle panel to my left, but the crack was on the top.
Perhaps something rolls under the ceiling.
Also, if I were you, I would blow a compressor into the vents. Or put the car on a slope (face up), then the object rolled out of the ventilation pipe. It may be necessary the cable to clean the pipes or the vacuum cleaner.
Maybe something is moving in the console of the shift lever (nut, screw) or a nut has rolled under the holder of the glasses. First you need to thoroughly vacuum all the niches and pockets, carpets, under the seats, and then look further.