Anyone know anything about flux.ai/…??

scalpers

Figure out the part you want based on stock, order it, and then make your design. I've had parts go out of stock between the start of a design and when it's done.

Interesting thing is right when the shortage started there was something (not sure but I heard it was with tariffs) so many of the asian suppliers bought up a multi year supply of IC's, and that was on top of the covid shortage. Now if you have to have parts, you have to buy them from asian suppliers at exorbitant prices. If that is the case, I don't think the politicians understood that tariffs would cause north american countries to have to pay double for their parts.

As far as the STM's go, you can get stock enough to prototype with from 3rd party distributors, you'll pay 'through the nose' to get any. The STM32's are all gone from distributors (I checked digikey a few weeks back and they had less than 20 part numbers in stock out of 2900ish STM32 part numbers). (I also have some STM32F103's left over in a qfn package if you want some of those).

I've got about 100

The other problem isn't just microprocessors, I've been looking for ADC's and other parts, I've been able to find stock at rates in 10 to 20% more and source parts. Now there are parts that there is no source at all or there are only qty's in the 100's world wide with markups of 1000%.