It's definitely not available as accessory anytime soon.
If I were you, I'd checkout the parts department of Hyundai dealership, tell them you'll need to buy the entire tonneau cover assembly and supporting hardwares because you drove through Hurricane Ida and a tree fell on it.
As part of the vehicle, Hyundai should stock those for repairs for the trims that come standard with the tonneau cover.
I'm not sure if Hyundai checks, but I know that for Toyota ordering something like a TRD Pro shocks requires the provision of a valid VIN that actually equip those parts.
And luckily we have big enough database of VIN for your choosing
