I've seen them, but I don't know where to get them.
I've never seen them on-line, yet.
You might be able to find one at one of the mall shops that just sell "accessories". Since long hair is actually in style now, it seems they shouldn't be too hard to find, but "fashion accessories" from those kinds of stores are pretty random. So... about all I can do is wish you good luck!
If anyone else has ideas, please post them!