Finished product:
As said above, this particular method might not work for you if you haven’t done a ‘relocated lighter mod’, but hopefully it will help you think of some ideas!
*I used cardboard and duct tape to come up with the original design because it is easier to work with. Once I got the correct dimensions, I made a real sleeve out of polystyrene. I used a heat rod to soften the polystyrene so I could bend it, and let it cool in place. Cardboard and duct tape works fine, but it just looks ghetto.