Never heard of that, but we could use one. I keep remembering about that Murkowski chick in Alaska who ran as a write-in candidate in the general election after losing her primary -- and she won. If I recall, however, there were serious questions about the legitimacy of her victory. I think the GOP-E will pull out all the stops on this one to do something similar for Cantor.
The Virginia GOP is busy trying to take out a Senator with one of their own. Doubtful that they will help out Cantor now, too big of a margin.