67 exhaust manifold

[mjrmn]

Hey guys --I have a cracked exhaust manifold on the passenger side -- It is the original rams horn center dump for a small block motor.
Where would be the best place to find a replacement?
I have checked the local parts store but their books don't go back that far and the kids at the counter were no help at all.
The ones I have found in the scrap yards don't look much better than the one I have.
Any help is much appreciated!!