Oh yes. When Cotton was a wee one I spliced my share of cords. Not laptop cords tho. But I am sure you know the drill lamp cords sleep number bed cord chewed in 5 pieces tv cord lol n such.
I forget the name of them but my Mom found them at Stines Hardware for around 3.00 They are like the ones you show. I can stuck 2 fingers in it. Well I have lady hands and they are small. The covers have a split down the center makes it easier to put the cord or cords in it.
The thinner ones Cotton has chewed on but the thicker ones that you can stick 2 ladyfingers (human fingers yes pun intended) in are the better size to get.
By the way I replaced the chewed laptop cord at a reasonable honest computer repair store that had pieces of this n that , That the couple accumulated for 25.00 It was the exact match So maybe that would help you get a cheaper one than paying top dollar for new ones.
Plus I keep my laptop on top my couch headrest and for some reason Cotton hasn’t chewed the new wire on it. I have also thrown a towel over it to discourage chewing. Been safe ever since
good luck 