I wasn’t around when the Exocet launched, but from what I can tell, it started selling in October 2016. You can still see people looking for used Exocets in B/S/T groups despite more modern offerings. Good luck finding one!
Watch out for the Hellfire Exocet 2. We don’t know when it’s dropping, but a prototype is being shown off here and there. Keep an eye out on their website!