If they still exist in retail, it's from a collector somewhere. There's a fire wand with -10% damage +10% speed offered by the collector outside Nolani Academy.
Even still, it'd be kind've overpowering on an IW build, so I doubt it.
I don't know . . . no +attack speed swords AND Hundred Blades being made elite really seems like they made a conscious effort to weaken Illusionary Weaponry.
I really hope there still are +attack speed swords, but I'm not feeling too optimistic . . . if anyone sees one, let me know.