Cast iron or rolled sheet metal exhaust part for347 Pontiac V8 motor

[Guest danceswithpumps]

I need this "Y"part that ties the left manifold, shown in top of first pic, into the right manifold,shown on right side of first pic, and then goes into the single tail pipe, shown at bottom of first pic.

Mine is cast iron and as you can see, the one ear is broken. It looks like casting number 528888-8. A sheet metal one would also work ok.

Thanks for your help.

Rod