Aluminum ingots A7 99,97 purchase, 20 000 monthly to China

I would like to buy aluminum ingot A7 99.97%.
- 5,000 mt trial order payable by escrow account deposit. 
-  the rest of the contract 70% payment DLC with SGS at the destination port in China. Quantity : 20,000 mt /month x 12 month contract.
Kindly send your quotation and specifications of the ingots.