I think you could chose from the various lists provided exactly what you as the individual would feel comfortable with. Colin is a man that knows about these things.
As it is a Morgan it will be something like the Headlamp stalk control that fails and the local Land Rover garage will have one and you wouldn't think to take one.
This happened to one of our German colleagues on TM last year mid holiday.
By the way I think Martyn's kitchen sink (wet wipes) is probably the most useful as no matter what you do on a Morgan you always seem to get covered in grease/muck
