[DeTomaso] Two-piece Mustang rotors source?

[MikeLDrew at aol.com]

Hi guys,

I'm parts-chasing for a couple of guys who want to vintage-race their 
Panteras; they are after a set of stock-style vented rotors (that is, the vented 
rotors that were optional on the Euro GTS and found on the Gr3 Pantera), 
which are the same as '65-67 Mustang discs.

I know that most Mustang rotors are now only available in a one-piece 
design (the disc and the hat cast together), but originally they were two-piece, 
with the disc separate from the hat; that disc fits the Pantera hubs 
perfectly.   They are getting harder and harder to find--does anybody have any 
specific leads today?

Thanks!

Mike