Here is a simple PCB leg, you can print a set of 10 on a single Prusa i3, ans use them to install a motherboard or another PCB on a wood deck for example.

The included Gcode file, will print a set of 10, with ABS, on a prusa i3 with heatbed.

use some 3mm woodscreew and washers if needed and it will do the trick :)