Need a contract for copper cathodes

We are a holding company & have offices in SPAIN, UAE and OMAN.
We have buyer now for:
GOODS: copper cathode
PURITY: 99.97 - 99.99%
QUANTITY: 2000 - 4000 MT monthly for 12 months
DELIVERY: CIF Istanbul Turkey
PAYMENT: with LC
Note: Seller will pay our commission