巴基斯坦采购需求：风力发电厂，垂直轴风力涡轮机

I'm reaching out to express my interest in purchasing an off-grid air energy generator designed for research and development purposes. I'm looking for a unit with a power capacity of approximately 600 watts at a 24-volt output. Could you please provide me with the total cost for delivery to Karachi, Pakistan, including the air cargo charges? Your prompt response will be greatly appreciated, as I am eager to move forward with this project. Thank you!