The rubber dash pads came with the car. Sorry can’t help.
If you struggle to find some. Here in the uk a few 356 car brands use a 1/4” hardboard strip and cover one side with foam and shape. They use something similar to the escalator bolt mentioned but it being a nut to fix to on the foam side of the hardboard. If that makes any sense.
Door tops, again here in the uk are either fibreglass or routed from some hardwood. Bit like the dash brows being wood.