So... You've gotten it already... then dropped it? Or dropped the storage slip it was in?

Have you "reset your memories" so you can redo the AF1 quests?
There's a gobbie in Jeuno that handles that iirc. lemme find you a link to the wiki.

EDIT: Oops. My bad. it's an Elvaan dude. And it costs 10k to reset.
Hope this helped.