An aviation supplier
https://www.aircraftspruce.com/menus/ha/fast.html
and auto racing suppliers
https://www.summitracing.com/int/sea...Default&page=4 https://www.jegs.com/p/JEGS/JEGS-Qua...Id=-1&Nrpp=180
It looks like the auto racing folks are mainly using a system with a wire across the hole that the stud engages while at least some of the aircraft systems use a stud with ears to engage an anchor plate (which appears to more closely match the sample shown from the carrier).