Need copper cathodes, 500 mt trial to USA

We are interested in copper cathodes purchase. Non registered with DLC non transferable, payable against SGS or similar at destination.
Trial 500 MT and afterwards 5000 MT monthly.
Will need last perfomance proof of shipment after our POF.
Now we require to know name of last country you delivered Cu cathodes and name of inspection company which certificated Q&Q at destination