Need a case back for 1959 President C

I have a 1959 Pesident C model that has a badly damaged caseback. I need a new caseback but I have been unable to find one. Does anyone have one of these csebacks they would sell?

It is marked 10K Rolled Gold Plate, Bulova L9 and there are no case numbers inside it is only marked: Bulova, Fifth Avenue, New York.

I don't know how to add photos or I would.