Model prints well in PETG. PLA might work better as the spring tend to be a little too compliant when printed in PETG.
This should be a drop in replacement for the commercial bracket.
The author remixed this model.
I first changed the dimensions to match the commercial bracket. Also made the spring slightly stiffer (helps when printing with PETG) and I made the ‘clip’ a bit sturdier. Changed the corner geometry from fillet to chamfer.