My wife has an antique teacher's desk and wanted to use her keyboard at a more comfortable height. Since the center drawer is at a better height I designed some keyboard support stands that fit in the drawer, between the integrated drawer divisions. I left a slight space behind the support stands to let her put her ruler in the storage space.

Just print them, stick on two rubber pads on the top of each, and rest your keyboard on top to have your keyboard at a more comfortable height. This was printed in white PLA at 0.20 Standard settings with no supports.