Here you go

http://www.teufert.net/misc/rotors.pdf

new rotor thickness would be 1.00
minimum thickness would be .965

I have a set of NOS ones. I should mic them and see what they are at.

But you can run them lower if need be. I know guys running them on race cars at .935 thickness after they turned them. No issues. Guys running them on the street and especially the "show" guys would have no problems in my opinion.
Gotta get them pretty hot to fade or not stop.

Only problem is that some machine shops may mike them and if they are not in spec, may NOT turn them for you.