Harry,
I think Shooter put his PCD and Offsets on Talkmorgan somewhere.... you might find them if you're nifty with the search function. Alternatively Shooter will be able to tell you directly.
Personally I don't have this info, but I'm sure the factory would tell you if you gave them a ring.
I do seem to recall the offset is not easy to get hold of.
Some aftermarket wheel companies do have the Morgan Aero listed... so probably have the information you are after already.