Andrew, I will swap you the S2 one (which I have not seen) for the Morgan Aero Supersport (Also covers pretty much all the grubby bits of S4 and Coupe) Parts catalogue which may assist you?
Interesting ...but no prop shaft illustrations so going to stick with the S2 to 2016 reference as this has the part number ...let's see if Morgan can locate 1 though
AnDrew G 2003 Aero S1 - past 2009 Aeromax - past 2012 +4 Supersport - past 2008 Aero S4 -past