希腊采购需求：LED显示屏、桁架帐篷、舞台、灯光、音响系统

I'm looking to source stage truss and LED screens for an upcoming event. The dimensions for the stage are 6 meters in length, 4 meters in width, and a height of 7 meters. For the LED screens, I need them to be 4 meters wide and 3 meters tall. It's important that both the truss and screens can support the technical requirements for high-quality performances. Could you provide detailed specs, availability, and pricing for these items? Additionally, I'd like to know about the delivery times and any options for installation assistance. If you have recommendations or additional products that might enhance the stage setup, I'd love to hear about those as well. Looking forward to your swift response!