Hi there. Make your own racking. shelving system. 12mm plywood sheet. If you get at B and Q or some wood yard they will cut for free. Cut each piece into 2400mm by 400mm or 600mm Buy 38 x 68 cls timber and use to make the racking. You can adapt the shelf height at 2.4m legths or 1.2m lengths to make things simple. This is a shot of the racking i am building in the loft. I used 12mm MDF as it inside.