Storm Vendor set appearances sold during the Dragonflight pre-patch event will once again be obtainable as ensembles in Patch 10.0.7.
Ensemble: Cloudburst Regalia (Priest, Mage, Warlock)
Ensemble: Cyclonic Battlegear (Hunter, Shaman, Evoker)
Ensemble: Dust Devil Armor (Rogue, Monk, Druid)
Ensemble: Firestorm Armor (Warrior, Paladin, Death Knight)