Last year we had an athletics carnival on in Wagga Wagga, and on the way home we all stopped at "The Dog on the Tucker Box" 5 miles from Gundagai

, and outside the shop there is a HUUUUGGGGGEEEE wisteria, that was laden with seed pods.
I collected a few, but never planted them but assume that every year around March if you drop by it will have plenty more.
or else just find an old wisteria in someones garden, and see if they are seeding at that time of the year.
( there is a very old one) on the corner of Victoria Rd and Wharfe rd West Ryde, and the Azalea gardens in Caringbah have som really old ones on the front fence.
Ken