eBay.
You just have to watch for "diamond in the rough" auctions.
The auction I picked that stick up in also had TWO used (but still decent condition) wico 8-ways in it.
Wico wasn't mentioned anywhere in the auction title, and there were some really ugly sticks in the package, that I think chased some people off of the auction.
That smallish 8-way is the one that SOLD me on the auction though.
I sized it up compared to the Wicos, realized the stick was alot shorter and the ball alot smaller, and thought it would make a great Defender stick.
I didn't want to pay the going price for a Defender stick in decent condition, and most of the "used" Defender sticks are really hammered, and unrepairable, for the most part.
The pivot on them wears to an oval shape, which lets the stick slop all over the place, and the restrictor wears down, so that the stick travels too far up and down.