I moved to TAOM chalk and needed a belt clip for it. This will hold a TAOM v10 (haven't tested with other roud TAOM chalk, but I imagine it would work fine). Printed both parts out of TPU. .2mm speed profile @15% infill on a MK4
You will need an 18mm X 3mm magnet for both pieces. I found mine at HomeDepot. A little superglue on both is also a good idea (necessary on the belt/pocket clip).
UPDATE - added a model for a TPU cover. It's intentionally super tight. It'll take a little bit of effort to put on the first time. I've been using mine for a long time and the cover does get easier to get on and off over time.
The author marked this model as their own original creation.