The clip for my bike lock holder snapped in the cold, so I reversed it and made another.
If you are also missing the spring, I found a similar one: https://www.thespringstore.com/pc042-328-5000-mw-0440-cg-n-in.html
The height and diameters are the same. I'm unsure of the spring constant but it is stiff.
Print info:
Printed in PLA but PETG might be better for UV resistance
~30% infill, 3 walls
Printed in shown orientation for strength along the clip (where my last one broke).
The author marked this model as their own original creation.