Finding formula is nearly impossible these days. Here are some things to try and help other parents out!
DO NOT MAKE HOMEMADE FORMULA! This can cause severe medical issues for your child.
Reach out to your pediatrician or OB office. They likely have samples they can give you. They also can let you know about reasonable substitutions that won't cause your child harm.
Join facebook groups. There are TONS of groups being made to help find formula. There are local ones and national ones. I have gotten a lot of free formula from a local moms group of people just giving away their cans. Please beware of scams when you go this route though.
Reach out to Enfamil, or the company directly. They were supposed to be sending me some additional sample cans but I have yet to receive them. They also have a hotline that helps you find formula.
1-800-BABY123. Open M - F 8 AM - 8 PM EST
Here are some links to some places I have seen formula in stock recently. I sorted it by the type so you can easily click them!
GENTLE (PURPLE CANS)
INFANT FORMULA (YELLOW CANS)
SENSITIVE FORMULA
OTHER OPTIONS