Donor Milk

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My daughter was breastfed for only 3 weeks then my supply completely dropped. After unhelpful lactation consultants, and unsuccessful relactation attempts, I’m considering a milk donor. My daughter is 5 months old now and has been on Enfamil Enspire (their closest to breast milk, though we all know nothing comes close). I checked out Mother’s Milk Bank, but they’re asking $3.75 an ounce. Does anyone know of any other ones a little cheaper or is that the best I’ll get?