Get a copy of Paul Pitchford "Healing with Whole Foods". He has a very good chapter on children's food. To make it brief, if mother's milk is not available, or for some reason cannot be accepted by the baby, the four options in order of priority are:
1. Another mother's milk (wet nurse)
2. Goat's milk, preferably from organically raised goats.
3. Highest quality milk replacement formula.
4. Unhomogenized cow's milk, preferably from organically raised cows.

In the same chapter, there's also some simple Oriental food therapies to strength milk production / digestion.

Besides, homeopathy should help this milk intolerance problem.