There is an original Ford round corner battery box lid for sale at Hershey by Dave Simmering, in the South Chocolate field, space CI 8. It was marked $90.00 when I saw it.
Just posting the info here, I have no connection to the seller.
I also saw two square corner lids at another space, but I didn't note the space number. I'm pretty sure it was in the rear section of the Red field.
Yes, I saw the originals too ... and a reproduction box and lid. Box had Ford embossed on the side,
I sold it. It was at luray as well
I got a PM from Bill Anziani saying that he was able to have a friend of his who was attending Hershey pick it up for him. Glad you found one, Bill!