Foundry? I don't think they're castings, more likely machined from steel Billet. Try e-mailing Lalli Singh in India, he's probably one of the most clued up folks over there, and he's used to dealing with Westerners.
If you were wanting to produce custom iron barrel cams that would be a bit easier, I know Henry Price in the UK uses AVL cams as blanks!
A.