Milwaukee finally released an M12 band file. I had been waiting for it for ages, so I of course bought one straight away when it was available.
As I had already made magnetic holders for the M12 angled straight grinder, it was a no-brainer for me to model a nice holder for the band file as well.
You can find the files for this model here: https://www.printables.com/model/482977-magnetic-band-file-band-holder