Possibly look into the covers available from GM that could be ordered with the car. It looks like you need an outdoor cover, I would assume the outdoor cover is made by the same company as the indoor cover that can be ordered with our cars (that I have) but I thought mine worked great last winter. Seemed very high quality and even had the ZL1 logos all over it. It specifies only for the standard ZL1 but I can verify it covers the entire car over the spoiler and all just fine. Fits splitter to rear bumper no problem! Perhaps someone has the outdoor cover and can confirm fitment on a ZLE? My next thought would be to, as insurance, place a microfiber towel on the cannards and possibly the ends of the spoiler to help with potential rubbing issues on the new cover when you get it. This would be the outdoor version for your situation...
https://accessories.chevrolet.com/pr...tegoryId=12004