Buying Zinc Ingots

I am interested in buying Zinc Ingot. The description of the product i need is listed below:
Zinc Ingot 99.995% Purity
QTY 15000 Kg (silver color)
Qty 20000 Kg (white color)
Size:
Length : 16 Inch
Breadth : 08 Inch
Height : 1.75 inch
Specification:
BS-3436 of 1986 Zn 4