@Casey-Kolb
The below WaveShaper Equation is the exact clone of the Hise Saturator & ShaperFX Saturation (except the AutoGain) section. You can use this with SNEX node.
The class location is here: JUCE Modules > hi_core > hi_core > UtilityClasses > Saturator
input = ((1.0 + ((2.0 * amount) / (1.0f - amount))) * input) /(1.0 + ((2.0 * amount) / (1.0f - amount)) * Math.abs(input));