Fixing cupidjuicecc's solar flare alien/falien skin tones

I recently found these custom alien/falien skin tones by cupidjuicecc, which I'd like to use in my game. However, they haven't been updated since 2017 by the original creator, and I can't find an updated version anywhere by anyone.

I was hoping someone would be able to tell me what I can do to fix them myself to make them work with the current game version.

Thanks in advance!