Yep. No doubt about it, your doors have been chopped. Decent job too considering how long ago it was done.
What you can do is cut a piece of 3/4" plywood to the shape you want for running boards and then use it as a pattern to cut another piece. Then cut a piece of 14 ga. steel a couple inches larger than your pattern. Sandwich the steel between the two pieces of plywood and use a hammer to bend the edges down. If you do this carefully you can wind up with a custom set of running boards that look almost factory.
"Remember, if you didn't put it together with your own hands, its not really yours." - Tim Allen