My used Model X came with the tow hitch already attached and I really didn't think to look to see if the cover was in the car. It wasn't. I took the hitch off and now I have an empty void on the underside of the vehicle. The Service Center says this is a "trim part" and my warranty won't cover replacement. He said he thought it cost $300 or so. Does anyone have theirs off now and can give me the part number? I'd like to try and find a used one on eBay or from a salvage yard or something.