I was wondering if there was something like this too! One of my kitties has chewed two of my laptop's AC adaptor cords and they're so expensive to replace.
you can also purchase some spray called bitter apple that you can spray around the cords that will stop them chewing. You could give that a go - good luck! you really do want to stop this habit as soon as possible
Ikea also has some very reasonably priced tubing for wires. They also have a bag that can hang on the back of your desk for hiding and keeping safe all those computer wires.