doors are still avaliable .. new and used , but like the 79-83's they are getting a little more difficult to find "good" used ones . The way the steel doors are built , the skin folds over the flange of the door shell , and then a couple of spot welds . factory ones are then seam sealed , aftermatket ones are not . This is a real sore spot for rust , and very difficult to ensure for no rust in the future .
With the fiberglass skins , you can actually seal the inside , and prep. for no rust in the future . www.toyotafiberglass.com/skin_install.htm . Like I did on my Trekker . I dont think I will ever have to worry about rust on my doos again