Pete,
You could buy Profili. Not sure these days but it used to be around 40 euros. You could buy it online. It has a huge database of foils and it will not only give you the offsetts to create the foil shapes but also all the foil characteristics including lift and drag.

I know that the voices in my head aint real,
but they have some pretty good ideas.
There is no such thing as a quick fix and I've never had free lunch!