巴基斯坦采购需求：惠普/佳能，OPC，打印机

I'm looking to place an order for 500 units of one type of drum and another 500 units of a different type. I'm interested in understanding the current pricing, lead times, and any available discounts for bulk purchases. If you have these products in stock, please provide the specifications and any relevant documentation. Additionally, I'd appreciate it if you could share details about your production capacity and any options for expedited shipping. If there are variations or recommended improvements for the products in question, do let me know. Looking forward to your prompt reply with the necessary information!