For zac, even if you get the shape right, if the texture is wrong, he won't look the same.
Are you guys using the enkil texture in the end?
Are you keeping him on Genesis 3, or is he Genesis 8?
I have tried to replicate him in Genesis 8, as I don't like having different generation models interacting between them. It gets complicated when trying to use different pose sets at some point.
This game has a mixture of characters, mostly Genesis 3, which sometimes have G8 counterparts, and sometimes they do not. I would start most of my searches for this game with Genesis 3 as that is where most come from, at least originally. Sophia is made with EJ Adora which is G3 only. I tried the conversion scripts and disliked the result. Unless there's an existing G8 model I can use, I won't bother as looking like the original is more important to me than some sort of Genesis 3 phobia.
I posted my Zac (G3M) duf in the past... this is what mine looks like the last time I done anything with him, which isn't too bad...
I don't have my notes on what I used for him... from a glance I used a character called "Lil_Luke" for textures, Lil_Chance for the head... not sure why I don't have notes on him. I liked how this turned out anyhow. He also uses Jonathan Hair and Dicktator Genitalia as his is rather large and strange looking in game and uses this genitalia I am certain (though personally I hate this one but...)...
Here's my scene subset again...
View attachment Zac (G3M) Scene Subset.7z
Sophia 
Parker ... Sophia Parker
