Well, what I typically do when I'm searching for cosplay ideas is visit sites like CosplayMagic (
www.cosplaymagic.com/) and browse their collection. I never buy anything, but it does give me ideas for future outfits and what that outfit may entail (since CosplayMagic gives you multiple views). I know that their outfits aren't 100% accurate, but it's a start.
I've actually never done a cosplay that didn't involve a skirt/dress so I'm not sure how much of a help I can be. *sweatdrops* If she wants to cross dress, I know a bunch of male characters with cool outfits that she can be. While I do know some female, that selection is waaaay fewer. Sorry.