Rear Fender Rockguard/mudflap/lip

After extensive searches through google and this forum, I still can't find what I'm looking for. I would like to buy the plastic piece that comes stock on gt350 rear fenders, to protect from the rocks that the tire kicks up. It seems like it would fit fine on a GT as the rear fenders are the same.

Where can I find this piece? My last resort is asking the dealership.

This is the best picture I could find.

https://imgur.com/JEq4jvv

Try this link which includes the clips as well. You will have to modify this slightly to make it work for a non GT350. Search the forums for more details.

https://www.levittownfordparts.com/mobile/ford-mustang-splash-guard-rear-p-4651.html

Just what I was looking for. Thanks!