I still think that the dealers should get onto this, and do a Morgan disc which resembles a tax disc. It could show the model, and leave space to show MOT expiry as a reminder (for example).
However I'm also thinking about a tax disc from the year I was born, or maybe the month & year I passed my test, or the month & year of first registration of the Morgans. Still pondering.
I want something in that holder.