Sure, but possible vs probable, it seems less probable more would appear. People love to talk about mythical pallets appearing, but that is quite rare. Could it happen though, sure it is possible. If you have information that makes the scenario more likely, great you should use that information to make the best decision. As far as hoping, I hope we do find more, these controllers are kind of awesome, I hope you know something we don't so more people can get these.
@supergamboy They were sold by Gamers Express Online, which appears to have no affiliation with Realtec, I am not sure if other amazon sellers had it though, but this is what my receipt shows.
As far as demand you are probably right, I am not sure who wants these, I am also not sure how many people really know about them.