Blum Heavy Duty Cutlery Tray to Fit Most 30cm / 300mm Drawers. Heavy Duty Grey Plastic 214mm Wide x 422mm Deep x 57mm High GT1/300 : Amazon.co.uk: Home & Kitchen
300mm Grey Cutlery Tray for Blum Metabox Drawer | DIY at B&Q
ArciTech Cutlery Tray for an external 300mm wide unit
Cutlery Tray for Drawer, Cabinet Widths: 300mm, Depth: 430mm, White - Furnica