If you have loyalty points you may be able to buy reclamation tokens. Then head to a npc merchant, click on them they show their normal wares and the tab labeled recovery. If your aug in there yes you can reclaim it. If not try hailing the npc again or petitiion.
For Truth, Justice, and the Norrathian Way!
Tinkering is a trade skill which will not prevent the mobs from hitting you.