Here are some 19" server rack blank plates sized at 1U, 2U, and 4U that should save you a few dollars over purchasing from Amazon or Monoprice. I printed these in PETG at 0.2 with 20% infill, but do whatever works best for you. You'll need two prints of the side pieces, and one of the center. You will also need to flip the center piece upside down using your slicer software. After you have these printed, you can bond them together with CA glue. Please let me know if you'd like alterations of any kind. Enjoy!
The author marked this model as their own original creation.