When I woke up Friday morning Amazon still had a whole bunch, and I could've ordered one until noon - but I have no money yet. There were still sporadic stock on Saturday from different places. This is a completely different story then when the NES Classic sold out everywhere almost instantly
All I can say is keep trying. There should be more stock starting on Monday, just make a short list of places to keep checking in at. But hurry, I think you might have a short window before the Switch catches on and then after that it might become very difficult to find for a while.