THIS guy has excellent links. These are what I'm going to use on mine. Heat treated chromoly steel. All you need to pick out are some rod ends and you're all set. Here's a direct link to his site. Heat treating greatly improves the strength of the links. Plus they are a lot more affordable.
The reasonable man adapts himself to the world; the unreasonable man persists in trying to adapt the world to himself. Therefore all progress depends on me.