The earliest gear you can get this on is the Scavenger set. Just target legs, arms, body, and head until you get schematics for the different set pieces. After that, spend some scrap putting together your armor and pop it on!
And, as an added bonus, you get set bonuses for wearing partial and full sets. The partial set bonus for the scavenger set is a few seconds of extra damage after a backstab; the full set bonus is restored health after a dismemberment!