Your impressions are correct. You can't find any shares because AMZN is in the middle of a short squeeze. Last month 15% of the company was short, & I don't know where it is at now. Incidently, the float is probably very small so the situation is more desperate for short sellers. It could all be over in a week, but if it is like Presstek in could be this way for months. The long list of crocodile tears on this board is additional testimony that there is a short squeeze in progress. Most are in denial!
It is important to note that the price keeps going up, not because crazy investors are pushing up the price as a reaction to hype. The stock price is going up, because short sellers are being forced to cover at these extraordinary levels.
INCIDENTLY, IF YOU ARE LONG AMZN, ASK YOUR BROKER TO "BLACK OUT" YOUR SHARES. THIS WILL FORCE, SHORTS TO COVER, TO VERIFY THE OUR THEORY.