Carter Davidson, It seems the OEM cover is not available or extremely hard to find, could try contacting Apple. "Just a thought", If your MacBook is still functioning very well and it is cosmetic issue with the outer case, maybe consider putting a wrap on it or hard cover to save a lot of expense and make it look good again. 1st Link below is a guide to disassemble the Mac in case you do come across a cover, if not the other link's are just 2 of many offering wraps and hard shell cases that can hide scratches etc. Good luck.
I hope this helped you out, if so let me know by pressing the helpful button.
https://www.slickwraps.com/devices/compu...
https://www.amazon.com/MacBook-ProCase-K...
MacBook Pro 15" Touch Bar Teardown