AW3420DW, stand part number?

Hello, I purchased a 34" Alienware monitor a while ago. Last year I moved and it went into a box with its stand. I just took it out of the closet to set it up and can’t find the piece that attaches the monitor to the stand? I don’t wish to use another monitor stand and vesa mount as I quite like the look of its original stand. Anyone know what the name of this part is or where I could buy it? I attached a photo of what the part connects to on the stand. I also attached a reference image of another stand with a similar design but the part on that stand doesn’t fit on the Alienware stand. All help is appreciated. First image is the AW stand where the part must attach, the other two images are a reference to the part but on another monitor.