新加坡采购需求：护栏，高速公路护栏，W梁护栏，护栏，护栏道闸，防撞护栏

I'm looking to source Rockwool Sandwich Panels for roofing purposes. The specifications I need are as follows: panel thickness of 50mm, with a metal thickness of 0.4mm on both sides. The density should be 80kg/m³, and the panel dimensions required are either 950mm or 1200mm in width, with a length of 11,800mm. Overall, I need a total quantity of 1,500 square meters, which equates to two 40HC containers. In addition to the panels, I also require C-Purlins and standard accessories such as ridge, gable, and eave flashing, as well as inner spines. Please let me know if you can meet these requirements and provide the relevant pricing and lead times. Looking forward to your prompt response!