I know my brother was allergic to cow's milk (not sure what part of it) and that my mother was able to avoid problems by using goat milk. So that may be one possibility worth exploring.
Depending on your situation and your DD (e.g. does she need to gain weight, etc., and lots of stuff we may not know about), you will likely find that "milk" (human, cow, goat, or otherwise) or milk substitutes (formula) become a much smaller part of her diet over the next six months to a year, so honestly I wouldn't worry about it too much. Find something that works (even if it is expensive hypoallergenic formula) and go with that. I know (some) Mustachians like to sweat the small stuff, but in the overall scheme of things, this is a drop in the bucket.