Here is an OpenSCAD library to generate accessories for the IKEA Skådis pegboard.

Check the instruction linked below for the usage:
https://github.com/franpoli/OpenSCADutil/tree/master/libraries/ikea_skadis_pegboard_accessories

Download the source code linked below to generate your own accessories:
https://github.com/franpoli/OpenSCADutil/blob/master/libraries/ikea_skadis_pegboard_accessories/ikea_skadis.scad