Ford performance sells the swing with a gurney flap now. I got mine 2 weeks ago, reused the 4 factory holes from my track pack spoiler. Bother parts have OEM part numbers, but much cheaper.
https://performanceparts.ford.com/part/M-16600-FP
I got mine from blue oval industries for a cheaper...
I have these a set from domed numbers. Takes a little longer to get but worth it, not just flat vinyl.
https://www.domednumbers.com/online-store/Shelby-Splitter-Domed-Decal-Insert-p93840703
Its the red sensor shown at the top. You can see it, but have to put the seat all the way back, grab a flashlight and contort your body to fit in there.
These cars do have 2 clutch switches, one behind the pedal, and one at the top of the assembly. If you can get it to the dealer their scan tool can easily determine if they are operating properly.