Lost a purple ring cuz corpse despawned.

I was in the Valley of Echoes doing a quest and one of the Forgotten Depths Ambushers dropped the ring Signet of Edward the Odd. I was trying to create space in my inventory as I had none and the corpse de-spawned not but seconds after killing it. I could have blinked and i would have been gone. Since lost item are not recoverable I am making this appeal.

"lost item are not recoverable", you said it yourself. There's no appealing needed.