I know each team has certain star players that have full head scans that look great. However some other players don't look like their real life counter parts at all.
Why not use the community on the FanHub to select a few reliable people to model more realistic player face likenesses in game?
You could then use the actual player photos from the individual AFL team websites and UV map the player face photo on top of the fan updated player models.
eg. take Steven May's headshot photo at https://s.afl.com.au/staticfile/AFL%20Tenant/AFL/Players/ChampIDImages/XLarge2020/281085.png
You could then copy the partial face texture on to their player model to make it look more lifelike and realistic.