There is a way to make "one" cowling easily.

It's called the "lost foam method."

You do have to have the ability to shape the cowling out of foam. The glass stuff is easy.

My first try at it is the cowling on this 1/5 scale Gee Bee Z. Certainly an easy shape!

I'm sure there's plenty of information on the "lost foam method." Sorry I have no information, possibly others could suggest where to get it. Google "lost foam method?"

Let us know how you make out?

Charles