I didn't know if this is common knowledge so I thought I'd pass it along.
I've spoken with Cosworth USA and the said they had complete assemblies in stock. For 10K WHEW!!! However for things like timing belts and tensioners they may be able to help out.
http://americas.cosworth.com
And Crane grinding the cams, I'm willing to bet they they still have patterns lying around,
http://www.cranecams.com
Just thought this might be helpful.
Guy