Copper Cathode wanted

One of our trustworthy clients has requested us for supply of following commodity as per stated specifications.
Commodity: Copper Cathode.
Quality: 99.99% maximum – 99.97% minimum.
Quantity: 200,000 metric tons over a period of 12 months.
Origin: Tanzania, Zambia, South Africa or any other reliable source.
Shipping port: Tanzania , South Africa or any other international port.
Packing: Export standard packing.
Destination port: Tianjin Port China.
Shipping date: Within 15 days after confirmation of banking instrument.
Kindly give your best competitive quote.