After work today, I found myself at my favourite thrift store. As usual I found a few lengths of fabric but I also saw a cute little bookcase. The idea came to use this case in the sewing room to hold some of the plastic bins full of fabric.
Dragged it home and started sorting and organizing. Beginning with the yardage on the closet shelf and working my way all around the room, down one wall, across and up the next. And in the far corner, the very end of the line, I found the missing binding.
Where the X is, right down between the cutting table and the extra ironing board. It had fallen off the cutting table.