Here’s a rich site that deals with body image, but more it’s an activist site, as well.
AnyBody

From their website:

AnyBody is committed to encouraging a change in cultural attitudes towards bodies, food and eating so that women and children of the next generation can learn to be happy in and look after their bodies. We challenge the distorted and tyrannical grip that the fashion and diet industry have on the health of our mind as well as our bodies. We ask the government to take an honest look at what influences individuals’ health behaviour and to support realistic programmes to bring about change to tackle issues such as obesity. We also encourage individuals to learn to celebrate and cherish the bodies they are in. AnyBody calls for a reality check, of which every and any body can be a part.

There’s information directly for young girls and the women who are dealing with body image, themselves, and also for mothers of daughter who are struggling with those issues or are facing them in whatever way.

A valuable resources.