We can't find any source for this item (quests reward, drop, etc). It's highly probable this item is not obtainable right now. It seems that the New Brazales vengadores is obtainable.
Kopf (594) und Brust (590) heute in Mangled gelootet
+1 GS461 while farming orichalcum node at Svikin's stand, AGS did not update the loot table for this set
Dropped from Rufus, Little Emperor in Svikin's Stand at 461 gearscore.
These still cannot drop at 590 yet.
No they cannot. It's one on a list of a few unique legendaries that cannot still be obtained at 590+. The others include Headdress of the Archmage and the
Fearless Spy Cowl,
Can these drop 590+ since the new update?
Looted 465 GS from Rufus, Little Emperor at Svikin's Stand
This set cannot be obtained as Legendary. Only the head and feet are listed as possible drops from Scorchvein Enforcer in Shattered Mountain. No other piece can be dropped at 590+ GS.
Would be a great set if it actually existed since a second corruption type expedition is about to release.
Still can't drop 590+?