I converted my ea s-pak to a tibble lock system. I bought the plastic poles and tibbles from ford and it only set me back $20 if not less. If you already have the central locking actuators the only thing I would suggest is buying new door trims so the tibbles fit flush. Converting them is a pain. I bought EB fairmont trims from the wreckers, cleaned them and installed them for about $140, all four. Hope this helps.
I have something to say, its better to burn-out, than to fade away