Over engineering a solution, still it has identified people with more money than sense. Of course aiming it at macbook owners and you can assume there are plenty of those in your target market.
Why do you think this is over engineering, what do you use for this?
Personally I tried duct tape, which leaves glue marks, and tends to become ineffective over the not-so-short term…
electrical tape
Not viable in my experience.
Works fine for me, is cheap, easily replaceable, comes in a variety of colours.