If you can't find a used one, I still have two new Addco front sway bar kits in stock under the part number 164.
A few years back I ordered one for a customer, it took almost six months for them to ship it. Then, about every month or so another one would show up!
That company is so disorganized...
I am currently out of stock on the Mark Plaia designed mounting kit, but I can easily make up some more if there is demand.
His design mounts the sway bar to the body, not to the front locating arms, and makes a huge improvement in the sway bars operation.