You might want to put a note on your order saying "please don't send me a fake." I'm not sure if it would help or not, but it would at least let them know that you know the difference and that you'll return it if they send you a fake.
I think it's unlikely that they'd send you a fake since they're aware of the fakes and they appear to have replaced them with real DSTT's on their site.
Like ENDscape said, if they do happen to send you a fake you can return it for a real one.
-Bri