Utilizing the Skadis free standing peg board (https://www.ikea.com/us/en/p/skadis-free-standing-peg-board-white-00541574/), I modified an existing portafilter holder I found online.
I can't find source yet to attribute for the original portafilter holder.
58mm_Portafilter_Ikea_Skadis.stl | 297.7KB |