Digital sign transport stillages

National Highways are looking to procure up to 100 no. GRP/heavy duty plastic (or other suitable material) A-Frame stillages, they will need to be double sided and be able to safely transport 4 no. digital signs of any of the MS1 variant per stillage (2 per side) Each unit must be able to be removed without moving any other. The information screens to be transported will have a maximum dimension of ?mm x ?mm x ?mm and a maximum weight of 50kgs each.(200kg) The screens shall be partly visible when on the stillage and the entire face screen must be within the area of the frame. The rear couplings of each unit must be accessible. They will require a safe method of restraint for each unit individually to the stillage. The stillage will also require a 'soft' surface to the loading face to protect the screens. We would be looking to have methods for loading and unloading through the base for fork lifts with a multi access arrangement . The expected lifespan for each stillage (dependant on use) to be circa 7 years