1U blank panel for 19 inch rack
1U 19 inch rackmount blank panel.
Print two, and use three small cable ties to join the two halves together.
The design fits comfortably on the 220x220 print area of my Anet A8 (diagonally). It may just fit on a printer with 200x200 bed.
If there is interest I will create a version in three parts for printers will a smaller build space.