Single dad looking for extra breast milk to buy

Description

I am a father to a 9 week old child. Ever since he parted ways with his mother, he has not been gaining weight like he should. I have been suspecting that it is due to the fact that he does not get breast milk as part of his diet. I am therefore in search of a rich source of breast milk to supplement what I currently give him. I prefer mothers who neither smoke nor drink. If you are all of the above, then I can use your help for the kid.