It'll be pretty difficult to get one for an IA since there's never usually IA's in a group besides healer and the odd Sniper. I wish the best of luck to you.
Maybe on your server, but my guild is absolutely stuffed with agents. My "main" is a lethality sniper DPS, and we've been known to run guild ops with 4 or 5 snipers and operatives in a group of 8.
To confirm, I saw the identical Xenotech Enforcer's chestpiece drop at the end of SM False Emperor for me last week. You wouldn't be able to solo this on an operative - Malgus needs two knockbacks to get thrown off the bridge - but you could certainly 2-man it with a sniper friend for a guaranteed drop.