I called RHS and they said that all their distributors have them. They even gave me a # to call for my area. They did not even know what they were when I talked to them.
I have searched all over the net and nobody has these in stock. The part # I'm looking for is 12410. It is the 906 vortec style cast iron head but has the intake bolt pattern of both vortec and old style. I think they have larger valves too (2.02, 1.6). Anybody have a set of these yet?