You can make your own antiswaybar links for <$10/pair by just using 1/2x20 threaded rod available from Home Depot or Lowes, and two pairs of 1/2x20 rod ends (aka heim joints). Rod ends are generally available at any speed shop or online sources like www.summitracing.com
or maybe even Amazon.com: Online Shopping for Electronics, Apparel, Computers, Books, DVDs & more
I had to drill out the mounting bolt hole for the frame-side of the link to take the larger diameter bolt needed for the rod ends but that was an easy task. A nut can be fished up inside the bracket to hold the bolt in. You'll also have to drill the bolt hole in the antiswaybar just a tad larger too to take the slightly larger bolt to fit the rod end but that too is minor.
These are rod-ends, I used the top-right corner type of rod-end for both ends of my links.