Same problem as Morik, attainable in game by unlocking the God Quest - but the NPC for the 3rd Seal on the quest is not active, so I would like to do the quest without having to break the seal (which doesn't involve much to be honest.)

Sleipnir [0] [Footgear]
Item ID# 2410 (Sleipnir)
Type Armor Class Footgear Buy n/a Sell 10z Weight 350
Defense 5
Required Lvl 94
Slot 0
Refineable No
Applicable Jobs Every Job

Description Named after Odin's trusty steed, these shoes also mimic Sleipnir's powers.
Increase Movement Speed.
Maximum HP and SP + 20%
SP Recovery + 15%, MDEF + 10
Impossible to refine this item.
Indestructible.

ShadO was able to unlock a God item in Ro by completing all the in game steps. You should be able to do the same thing. In short you cannot quest for this item on the forums.