Duplex board white / gray

I am a company of Algerian importaion I'm looking to buy duplex board white / gray
weight 250 and 300 gr
Format: 650-1000
Format: 700-1000
Format: 800-1200
quality : GD 3 and GD 2
made me an offer price of C & F port alger algerie a quantity of 50 tons per month length of the year.