This might be more what you want:

http://www.daz3d.com/shop.php?op=itemdetails&item=2270&cat=60

I don't own it myself (it's on my wishlist) but it looks closer to what you want. But, like you said, to get the exact look you might have to model it yourself or have someone else do it.

Here's a page devoted to French braids if you need a reference for what it looks like:
http://www.braidedimage.com/Pictures-of-Braids.html