You can also consider trying out the Berserker Barb which I did circled around IK set and Blade of the Warlord! I suggest you guys use your speed run skills to do this scouring as well such as having Teleport on your Wizard or Steed Charge on Crusader if not you will definitely lose patience after awhile.
In fact, I took around 2 hours using my Witch Doctor to get one - thank God for Fierce Loyalty which allowed me to comb the map so quickly each run. To get it, you will have to go to Act IV: Garden of Hope Tier 1 and it might not be an easy trial.
I just got mine in the latest patch - 2.4.3 (season 9) - and I can therefore safely proclaim that it is still available. Searched everywhere in all the Acts of Diablo 3 and wondering if the 'Falcon Wings' cosmetic is still available in the latest patch? Fret not, being a laggard like me in the vanity item collection, it is still possible to get one!