You will need FIFA Mod Manager to use these kits.
You can download it here https://www.fifaeditortool.com/download
(I don't share PNG files)
Barcelona Kits from 1999 to 2021 (ALL IN ONE - Barcelona Kits & Faces)
Real Madrid Home 2004-2005...
I redid absolutely all my Barça kits for all FIFA (17/18/19/20)
So if you have already downloaded my barça kits in the past, you should download the latest version, all kits have been improved a lot.
Barça Mods version:
FIFA 17 : 4.0
FIFA 18 : 4.0
FIFA 19 : 4.0
FIFA 20 : 2.0