These bars are designed to clamp the display to a front panel of some description.

You need two of these bars and four M3 screws of suitable length (e.g. 10mm).

IMPORTANT: Make sure the screw do not bottom out, or you may destroy the LCD panel!

You will probably want to tune parameters like barh to adjust for bar stiffness, panel thickness and so on.

Straight print with no support. I used ABS but other materials will surely work too.