Dang - that’s frustrating - been refreshing the Amazon page every couple of hours and clearly missed the very limited window of opportunity!
Edit - Wooho! It’s back available this morning - just got my order in! With Amazon Prime it will be here tomorrow! (can you tell I’m excited?)
Edit 2 - Thinking about this some more, it may well be that these may be available regionally on Amazon - the ‘Amazon alert’ email came this morning at 8:47am (to 2 different email addresses registered on Amazon); but there was no alert yesterday which leads me the regional conclusion; you do have to put zip code to check if you are not already logged in as a Prime member, so I would have to believe it might be available for different parts of the US depending on specific distribution centre availability - hence why I didn’t see it yesterday, nor receive an alert.
So for anyone who wants to get this at the first availability, set up an Amazon alert to inform you when it it is available for purchase.
At this time of writing (Saturday morning, 8th Feb) it is still showing available for me (I am in Central California)