Formula recommendation closest to breast milk

Hi, I am trying to wean my 8 month old off breast milk gradually due to my dipping supply. I have tried doing 80% breast milk 20% formula mix for the first milk feed daily but baby has been rejecting to drink. I have tried nan optipro and frisolac gold but none seem to work. Any other recommendations of formula milk which taste close to breast milk I can try? Thanks v much in advance! 🙏🏻