Just off Amazon that one, quite handy - Under Desk Drawer Organizer Storage Box Pop-Up Pencil Tray Stationery Case Under Table Self Stick for Office Desk Tidy School Home https://www.amazon.co.uk/dp/B08LZP2C3S/ref=cm_sw_r_cp_api_glt_i_ERK2T78EP2NQJJV8MY4F?_encoding=UTF8&psc=1
awesome!
just to clarify, is this the monitor arm you have? https://www.amazon.com/AmazonBasics-Premium-Single-Monitor-Stand/dp/B00MIBN16O/
and did you install the mount in the center of the desk or off to a side? normally i suppose one could readjust with a clamp to figure out what looks best, but I'd like to only drill one grommet hole lol