Looking for Copper 99% 1000 mt/m

I am looking for 99% copper, I have customer with which we have dealt already that he will pay 5500 USD/ton, in any amount.

He will pay after His good are delivered to him. So i need supplier which will be able to supply me as often as possible and is able to give me some commission for making a final deal. Quantity we need 1000 mt a month or less.