Hi, Welcome to the Forum,
I am not sure exactly what you mean by Stucco - I presume a moulding above and below the window.
If you require something fairly fancy it would need to be created especially, but you can make almost any shape you want within TFP. The moulding above the window in the image below (and the vent above it) were made in TFP but all sorts of shapes are possibly as the second image illustrates. It is quite easy to do.
If you could provide a photo or drawing of something similar to what you want, I can describe the best way to make it.