“Habille ma poupée” is a web site where you will be able to find lots of patterns for American Girl doll and Cheries doll.
It is mainly in French but has a translation button.

Molly sweater’s pattern was on and off my needles for a while so there might be a few typos or missing info. Feel free to contact me if you see any. I will be happy to polish it as soon as possible. I am always dedicated to provide the best work.