Others have mentioned donated or sold breastmilk, that goat and sheep milk can work, and that canola oil-containing formula is better than starving. 100%. Iβll also share a product I know about.
This is a cowβs milk formula, so use with caution at first and see how your baby reacts to it. I do know some people have given it to their newborns with no problem, possibly because it is A2A2, Iβm not sure. I wish the same company would make a goat- or sheep-based one which would be a bit less questionable.
Serenity Kids Whole Milk Toddler Formula