Exhaust manifold, bolts and leaking oil heavily
 

I have a 2006 Mercury Milan premiere with a 2.3 liter engine. It's exhaust manifold had cracked and got worse over time until finally I had the money to replace it, considering how expensive it was because the vehicle has a secondary AIR flow system for California emissions.
It has been such a headache since to diagnosed the issue with it. I've replaced all three oxygen sensors. Now I believe I have to replace the AIR check valve.
However, right now I have oil leaking heavily from the manifold where it is bolted to the Head. Not only is it coming out from the top of the manifolds, it is coming out of all the bolt holes. I have tried 3 different gaskets. I haven't been able to locate new bolts anywhere. And I am not sure of the size of them what else would be compatible. If anybody would have any information I would greatly appreciate it!