Exactly the same as the original, but cut off the AMS tabs in order to allow it to be screwed into the AMS Wall Mount designed by Roland Deschain - https://makerworld.com/en/models/30231#profileId-83015

This could also be used to mount the spool holder directly to the wall, or any surface you are able to drill into.  Note you need to add two negative cylinders for the screw holes depending on your setup.  For mine I used 3mm holes spaced 30mm apart but please verify your measurements before printing. :)