Missing Eternity Ring, so can't annul eternal bond

Time: All the time
Frequency: Every time I speak with the "Sanctum Acolyte" NPC
World name: Moogle, Chaos Data Center
Character name: Sevyrr Flamesong
Retainer name: N/A
NPC name: Sanctum Acolyte
Monster name: N/A
Class/Level: Monk 60
Party or solo: Solo and in a party with previous Bond-partner.
In-game time: N/A
Area and coordinates: East Shroud - ( 17.7, 18.3 )
Housing: N/A

When I speak to the NPC to annul my current bond, I get the message:
<Could not annul eternal bond. Your eternity ring is not in your inventory.>
I've searched through my inventory, my retainers' inventories, my mailbox, my armoire, and any other place I could think of to find it, and it simply is not here.
How can I get it back, or annul the bond without it.
Thank you.