Chocolate bars private label production request from Israel

We want to produce a chocolate bar with rice crisps with nougat and caramel cream
What we are looking for from the factory:
It has a production line of chocolate bar and a production line of a packet of chocolate (regular tablet of 100gr).
It can do white label (private label).
We need to know the minimum order
We need to know the costs
We need to know if they can provide Kosher certificate