Not sure if it is one off, but first I have seen like it https://www.ebay.com/itm/2006-06-HUMMER-H3-STEEL-CARGO-FLOOR-PLATE-/363672338399?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=711-127632-2357-0