Share 'Easter Eggs'

Does anyone have any outstanding "fillings" for Easter Eggs.   I am in my first 2 years of this chocolate business, & finally have the pouring of the eggs down -  Molds that I can fill.  Now to find "tested" cream fillings.  My customer wants a cream filling like the Cadbury Eggs - I think it is close to butter cream.  Then I am also working on a peanut butter filling.