Someone posted this recipe for making your own low-carb milk. I think it was on another board and I don't remember who. If it's someone here, sorry I've forgotten. This is the variation I use. I think it's excellent, and cheap too! Hope this helps.
Mix these ingredients well and always shake before using:
4 cups water
5 Tablespoons nonfat dry milk powder+
1 teaspoon nonfat dry milk powder
1/3 teaspoon salt
4 drops liquid splenda
1/2 cup cream