中国香港采购需求：定制热转印标签

I am interested in sourcing high-quality thermal transfer paper in jumbo rolls. Specifically, I'm looking for 70gsm paper with dimensions of 50cm in width and 5000 meters in length per roll. Could you please provide the FOB pricing for this product? Additionally, I'd like to know how many rolls can fit into a 20-foot container for shipping purposes. Furthermore, it would be helpful if you could share both the net weight and gross weight of the rolls. This information is essential for us to evaluate the logistics and overall cost effectively. Your prompt response will be much appreciated as we're looking to move forward quickly with this procurement. Thank you!