Or you can hack it with Sugru: <https://sugru.com/what-is-sugru>. Not necessarily the best for aesthetics, unless you're a clay sculptor hobbyist or something, but it sticks tight to almost everything. Though as per the website: "Sugru does not bond to oily plastics like polypropylene, polyethylene or Teflon."
I've used it for all kinds of things. I tend to reinforce it if it's load-bearing (eg I made a bracket for my router under my desk, but molded the Sugru around a screw that I put in the desk). Each pack is very small, so it'll only be enough for corners or wrapping around wires very close to the end or whatever.
I’ve not had good luck with sugru. I’ve used it to repair a couple cables that started fraying near one end… the weird lump of sugru covered where i put it, but didn’t stop the fraying - bought me maybe another couple months of use.
I've used it for all kinds of things. I tend to reinforce it if it's load-bearing (eg I made a bracket for my router under my desk, but molded the Sugru around a screw that I put in the desk). Each pack is very small, so it'll only be enough for corners or wrapping around wires very close to the end or whatever.