tough question. Thats is some serious info you need.

Have you tried being cheeky and sending an email or giving someone like Burton Power a call. They specialise in engines parts and maybe able to help. I'm not even sure ford know what they put in them.

Best of luck though as getting the exact material will be difficult.
Most companies will probably say the following

Valve Springs - High Tensile Spring steel
Camshaft - Carbon Steel of a certain percentage
Piston Rings - Forge Alloy (try Cross Manufacturing Company. Think they do rings)
Cylinder head - Aluminium Alloy
Bearings - Same as camshaft
Block - Alloy or steel - not really sure on this one.

Also how are you doing the hardness testing? Is Rockwell or vickers etc? The hardness may also vary on how much heat has been passed through the material. i.e. Normalising, Annealling etc.

Hope this helps.