Cable retainers of various sizes which don't require zipties and allows cables to be removed.

Existing retainers I found would let a cable slip out on either side. To prevent that, this design uses opposing angles for each hook so that the cable needs to bend slightly to be inserted or removed. In practice this retains the cable better because it is unlikely to bend like that on its own.

The hook opening should be slightly tight on your cable so that it clicks in place and provides additional resistance to falling out.

I use VHB tape on the base to attach these to surfaces for cable management.

Parameterized Fusion model included if you need a different size or want to make adjustments. Adjust dimensions in the "Change Parameters" dialog under the Modify drop down in Fusion.

The dimension in the uploaded filename is the diameter of the hook's hole.