I get them unrigged from CharkBait.com. I see they have the Zuker ZG7 grass skirt in stock for $8.99, but not the feather skirt. I've not tried the larger size Zuker ZTW tuna lure.

What size Yo-Zuri Bonita are you using (6-3/4" vs 8-1/4")? I fished one for a few years (with no success) until the swivels rusted and the hooks fell off!