My Loop earplugs didnt include mutes, so Im glad I found below model to print my mutes

https://www.printables.com/model/663873-loop-earplug-mutes

Then I found the mute holder attachment for the original case with orgininal mutes.

I modified this to hold the printed mutes but found that it would not allow the case to close.

https://www.printables.com/model/937308-loop-earplugs-mute-holder-attachment

So i modeled my own case for the plugs and mutes following the round oem style but with threaded lid. (Modeled custom threads that are easy to print)

Goal was to keep the case as slim as possible but still functional.

I left the knob on the pins for the mutes a bit oversized so that you could file or sand them for correct fitment to the TPU mutes.

I opted for ASA printing this case with fuzzy skin, therfore there is no fillets or chamfers on the case because the need for bed adhesion.

But the CAD model is provided if you want to tweak it, there are thickness for fillets. 

Happy printing!

EDIT: Made one with fillets and loop lettering on the lid.