1999 Ford F-250 XLT Super Duty, interchangable years of body parts?

I have recently been Given a 1999 Ford F-250 XLT Super Duty 4X4 truck. Engine runs great and most of the body is in decent shape. I would like to replace a front fender and maybe one of the doors. Also need a tailgate for the box. I guess what I'm wondering is, how many years and what years did they use that body style?