To buy Aluminium Ingots

Dear sir/madam

For our client, we are looking for the following product:
Aluminum ingots A380, ADC-12, and aluminum 6063
The quantities varies from 500-1500 metric tons x 12 months.
Destination Taiwan and China.
 
Please advise our commissions which must be included in all prices, and overpricing policy.
We will need  official SCO/FCO with best CIF prices,Terms, Origin, Loading port, complete specification composition, and profile of suppliers some recent photos always help.
 
Thank you