What’ll happen here is that two or three companies will open up either in Mexico or Brazil...to sell their product in the US, without FDA audits/inspections. Easy access and will solve the current problem. However, once you have sanitation issues....will become a whole new and different game.
I wouldn't worry too much. There are millions of babies who use formula produced all over the world without incident. And it's not like the US pharma industry (that produces most of the formula in the US) is without incident.