What wheel arches fit a caddy Pick up?

Hi all am currently restoring a customers 1986 caddy pick up and have went to town on it the rear arches are letting it down and with the amount of work done seems pointless not replacing them, was just wondering are they the same as a 3door??                   Need to get this finished as ive picked up a caddy of my own that an idiot has been working on and i want to use it as an advertising tool for my new garage and restoration business
regards Eamonn