That's OK Nikos

I am also fresh to the Morgan community, and like you, I had similar questions. I don't understand, why MMC does not publish pictures, and/or descriptions of their options.
But here come my answers:
The wing beading is a plastic, kind of, insulator stripe between the wings, and the body. It is usually black, but it can be chosen in matching colors of your interior trim.
Concerning the hood... mine is standard, made of PVC. It protects pretty well against rain.

That's about the protection I expect from it, because I drive top down, no matter what the weather is, as long as it is dry. Maybe somebody else can help you better with this issue.
The tonneau cover, is used to protect the interior, when the vehicle is parked, with the hood down. In my opinion, this cover is only interesting, when you order the "old type" hood, which takes quite some time to put up. (The standard hood is put up and down within a minute.)
Salut from Luxembourg,
Ivo