The reason they've been "lost in the shuffle" is that they are a pain in the patoot to put back on, once they're removed. It wasn't necessary that they be on the tractor in order to use it, so most farmers tossed them in a corner and thought no more about it. They weren't worried about how pretty the tractor looked; they were busy making a living.
Cliff wants his Ollie to have every piece she started with, but no matter where he called, there were none to be had.
So he found a suitable piece of metal and made a battery cover himself; once the Oliver is finished, nobody will be able to tell it isn't original.
Here's a closer work; Cliff's very proud of his handiwork.
However, he was afraid to attempt the hydraulics cover, so he had my cousin do that. Is that guy talented, or what? He restores old cars as a hobby.