Will, have a look in Gomog for suspension details. A link to Mullberry is in the bespoke parts section. AVO supplied shocks developed by Rutherford Engineering for Morgans. Tim Ayres now sells them. I fitted them on my car last year if you remember. Rutherford developed the rear suspension hoop that Morgan went on to use.
Peter Mulberry developed independant front suspension and sells via Mulfab.
Peter Ballard developed the Suplex systems ( front and rear) that are the latest options.