Accessories | Doors | Roll-up Doors | Windows Need Modifications & Accessories? We can do that. Bolt-On Lock Boxes $100.00 Shelving Brackets $100.00 Small Vents $25.00 Portable Storage Big Air 45 $250.00 Rollup Door $1,800.00 36” Man-door $1,800.00 Windows 3’x3′ $1,100.00 Big Red Locks $375.00 Block Lock $55.00 Disc Lock $25.00