Here is one. Though it doesn't have the same waist as the ones you posted. (It's plus size.)http://www.lauramarshdesigns.co.uk/pattern-categories/free-patterns/Aline-skirt-pattern-22-36.html
Here is another one. (Pattern and tutorial.)http://ideas.stitchcraftcreate.co.uk/how-to-make-an-a-line-skirt-2/
You should be able to google free skirt patterns and find more to help you. I hope this helps.