If you are looking into Baby Formulas try the following links. I have searched these websites; they have in-stock.
https://natonic.com.au/en They ship to the USA.
Amazon Baby Formula Brand is also in stock.
Try delivery food services like instacart, they have some available.
Make sure you are checking your local Walt-mart and Target. They have limited stock in-shelves but constantly stocking.
Most stores like the above, Walgreens, CVS, Vons, Whole Foods ARE NOT SHIPPING you must pick up.
Worth the search: Check your maternal hospitals near you if you are in emergency of baby Formula. The WIC programs and even your Church for donations. If you don't have any baby formula please send me a dm and we can work together.
Hope this is helpful. Let me know if you were able to find some.