I would look on the used market, as the feds have been cracking down on that. Failing that, Supreme Muffler in Metairie may be able to fab something legal up for you.
The only way I know of to get that is by buying both cowl panels. They are still available. Expensive though. I recently bought a set for a 10-14 car...
I agree. The 2024 is the 60th car. But then there's this-the 51st car with a 50th anniversary edition:
https://www.cjponyparts.com/resources/50th-anniversary-mustang#perform
https://www.americanmuscle.com/mustang-amr-silver-wheel-19x10-33806g05.html
Same wheels as above (19x10) but in silver. Had them on a 14 GT. Listing says for rear only, but they fit fine with the Brembos.
Bought a set of these for mine a few months ago. Look to be the same.
https://www.tascaparts.com/oem-parts/ford-floor-mats-carpet-front-set-br3z6313086ce?c=Zz1pbnRlcmlvciZzPWZsb29yLW1hdHMmbD0yJm49Q2F0ZWdvcnkgUGFnZSZhPWZvcmQmbz1tdXN0YW5nJnk9MjAxNCZ0PWd0JmU9NS0wbC12OC1nYXM%3D