Be sure to place a wanted ad here, on HAMB
https://www.jalopyjournal.com/forum/forums/wanted.30/, and on the Early Ford V8 site
https://www.earlyfordv8.org/classifi...20Sale&c=Parts. A correct one for a show car is expensive but aftermarket ones should be less. Does yours use a standard rebuild kit? You might try Renner's Corner for a gasket kit or ask it they can rebuild yours (see attached).
Charlie Stephens