[aerohead]

My Morris Minor 1000 had 'friction' shocks.I didn't have X-ray vision,but I suspected that inside their was something akin to brake pads on either side of a section of 'rotor' if you will,with some sort of spring-tension preload keeping a constant force against the 'rotor.'
A mechanical disk brake unit from a contemporary mountain bike (yard sale/metal recycling center),with the cable held by a tension spring might be adapted to provide a damping function to the pitching.It would be extremely low mass if nothing else.