We spotted this one from @m1kew on Twitter and were sucked in by the name of the device which is JerkStopper. They have kits that look after your HDMI camera cables as well as Firewire, USB, and power cables, as well as RJ11, and RJ45 cables. Expect to pay around $13 up to $22 for the JerkStopper kits.
JerkStopper cable retention device provides slack in the cord preventing damage or dislodging. JerkStopper used in conjunction with the Computer Support for a complete tethered set-up, removes the stress and strain from the cable or cord ensuring the plug stays in and protects from damage.
For more info go to JerkStopper.