Steadfast Breastplate

Dropped by 3

• Rockwing Screecher level 59 0% 10409
• Voidwalker Minion level 47 0% 8996
• Dustbelcher Shaman level 43 2718

Dropped by, from a shared table 40+

• Atal'ai Witch Doctor level 50 5259
• Black Slayer level 48 5982
• Bonepicker level 50 5983
• Bright Crawler level 53 91831
• Brilliant Wind Serpent level 58 61480
• Dark Iron Lookout level 48 8566
• Dark Iron Sentry level 48 8504
• Dark Iron Taskmaster level 48 5846
• Deep Borer level 48 11789
• Deepshell Snapper level 52 91838
• Giant Surf Glider level 50 5432
• Great Wavethrasher level 54 6349
• Greater Lava Spider level 49 5858
• Greymane Justicar level 48 61417
• Heavy War Golem level 49 5854
• Incendosaur level 49 9318
• Inferno Elemental level 49 5852
• Ironfur Patriarch level 49 5274
• Island Pincer level 50 91832
• Jade Ooze level 48 2656
• Larnaea level 60 63034
• Letashaz level 55 92163
• Magma Elemental level 48 5855
• Margon the Mighty level 55 91839
• Murk Worm level 48 5226
• Quarry Slave level 48 8917
• Razorbeak Skylord level 48 2659
• Rock Crawler level 51 91833
• Silver Coast Crawler level 52 92147
• Silvermane Stalker level 48 2926
• Strand Crawler level 49 92146
• Subterranean Diemetradon level 48 13323
• Thunderhead Hippogryph level 48 6375
• Twilight Dark Shaman level 48 5860
• Typharion level 61 62748
• Vilebranch Ambusher level 47 7809
• Vilebranch Berserker level 48 2643
• Vilebranch Shadowcaster level 48 2642
• Wallowfin Murloc level 52 91857
• Whispering Hydra level 59 63005

Only the first 40 are listed.