Quicksilver mentioned that Morgan stick to British shock absorbers.
The standard shocks on roadsters and +4's were Sachs front and Bilstein rear. Both German. The Suplex kit use Bilstein and reset in the UK by Bilstein to suit the Morgan.
Suplex now supply Morgan with their springs after the original supplier's were poorly tempered and sagged.
Interesting debate, but having owned 5 Morgans, all different models, for the last 40+ years, they all had there own different character. Their handling has been improved by Rutherford, Spax, Koni, AVO and and now Suplex respectively. You could always put the original Girlings or Armstrongs back on if you want original British and can find them in a garage bin somewhere!