Heyo,
I've creaded a 3d Printed Hiking Pole Clip, check it out at https://www.prusaprinters.org/prints/152057-hiking-pole-clip.
If you need other diameters, just let me know, I'll update the files and upload them.
Buen camino!
mamu
p.s. it's free, no charge, no fees, no viruses :)