MEJE - 28-3/8" X 15-3/8" Sink Protectors with Center Drain for Kitchen Sink,Stainless Steel Sink Bottom Grid for Single Bowl Kitchen Sink - - Amazon.com
Serene Valley Sink Bottom Grid 28-9/16" X 15-9/16", Centered Drain with Corner Radius 3/8", Sink Protector NDG2916C - Amazon.com
Bottom Sink Grid Sink Protector 28 9/16" x 15 9/16" Center Drain 3/8" Corners | eBay
Sink Bottom Grid 28" x 13-15/16", Rear Drain with Corner Radius 2", Si — Serene Valley
VGSG3018 Series 27'' W, 30'', or 32'' W x 15'' D Silicone Bottom Grid for Single Bowl Kitchen Sink in Multiple Finishes by Vigo Industries | KitchenSource.com