Provided they still have the mechanic, just set it up with whichever shopkeeper handles duplications of that kind of item, and wait for the quests to roll in. Ryza isn't going to need to work another day in her life and will be rolling in the dough. (Especially back in Rorona - by the time you're rolling living pies off the assembly line and have manufactured ultimate megabombs, the game is all over.)