2D layer manager for creating avatars

I'm looking for a Unity asset store package that will help me not re-invent the wheel here. In our game we want to allow players to create their own 2D avatar by picking noses, eyes, ears, hair, etc. This is a static avatar, we don't need animation.

We have hundreds of layers from photoshop and we just need an easy way to turn on/off layers and do some opacity/transparency/coloring toggles to blend between various layers.

Anyone know of any useful links for me to explore? Everything I've looked at in the asset store is a canned solution that is either 1) involving animations or 2) their own cartoony assets. We have drawn our own realistic character portraits.