Maybe use a cable and some bungee cord to secure it instead? I took a carton piece, cut a round shape, made random cuts and folded the sides down to make a round shape then tape the sides to maintain the round shape. Not more than 10 minutes. IF you leave a O ring on the torch's front bezel, it might have enough friction to keep it in place and removable during dives. Less than 5 bucks too I reckon.