I'm looking for character assets with "face parts" so I can mix/match. Any suggestions?

So I'm looking for ways to, dynamically, make many many unique faces. I think the best way to achieve that is to get an asset pack that contains like 20 face shapes, 20 hairstyles, 20 hair colors, 20 skin colors, 20 eye types etc. (Or more, preferably). But so far all I've google'd hasn't really resulted in a pack I can use. Either completely unrealistic (block faces) or they are pre-made faces.

Does anyone have any good resources? Doesn't have to be free either, happy to pay for a good pack.