help with ceiling please

[stevie-b]

We are replacing part of a lath and plaster ceiling that has fallen in.
I am trying to find a supplier of the ceiling decorations but don't know what they are called.

I have a cornice (around the wall and ceiling) a rose in the middle but i don't know what to call the decoration plaster that is in between the rose and the cornice. It is on the ceiling about a foot away room the walls as a sort of border.

I am trying to match the existing and wondered if i could buy some off the shelf, but first it helps to know what it is called.

 

[ic1927]

They are called ceiling panel mouldings.