Seeking retired tmog item.. can you help me?

[Leilleath-moon-guard]

It’s not the same as having the piece sitting in the bank, but instead some hope with no eta?

Some WoD Crafted Armor Sets and Weapons Unobtainable in Shadowlands

Yes, this is a side effect of Shadowlands development. We already have plans to reintroduce all of the transmogs in a future patch. So they’ll only be unobtainable temporarily.