While removing my radiator for a totally unrelated issue, I saw that the steering damper was leaking oil and would need replacing. I took it to a parts specialist (old friend of many years) who has managed to match it up with one from a Mercedes. For your information and I hope it may help if any of you get this problem, the damper off my Flaminia Sport was a Munroe which cross referenced to a Stabilus 363952 063/14 GH01.
Dave