I searched with //findall and also checked my dbox on every character.
Honestly, I can't actually remember ever using it or confirming its existence in the last couple months, so at this point I'm pretty sure I either just sold it last time I played and forgot or lent it to an LS member for WS trials and forgot to collect before quitting. I'm fairly certain I was never keeping it in my main inventory so it would have been hard to accidentally get rid of it.