Oh, I almost forgot! She could also use a sweater-design program, to make her own custom-fit sweaters. These programs are great, and not hard to use!
A great program is Sweater Wizard 3.0. You can download a demo of the program here. KnitPicks has a great price on it, with free shipping (here).
She can customize the measurements to fit her. The program is incredibly easy to use, and is surprisingly versatile and very easy to customize. And it creates a totally normal, very easy to follow pattern.
Another program is Knitware Sweater Design 2.40. Go here to download a demo.
I was just playing with the demos of these programs last night. I especially like the Sweater Wizard. Lots of options! It even gives you options for how you want to knit the garment: flat, in the round, top-down, and even side-to-side!
I don't know if there are default women's sizes that would suit her, but she can at least choose the child's size, and then lengthen the body and arms to fit her. It's very easy to adapt the pattern.