Batten W2 Alloy Heads

So what became of the Batten alloy heads? Is Douglas340 going to use them or are they for sale? I'm very interested in them if they are available as I'm building an all out race motor, not a street/strip motor. I have three 59 degree closed chamber iron race W2's and one 48 degree iron race W2 but all four have not been ported. I'm building a 422 to 427 inch motor.