I know an engine builder in Kansas, Missouri who does amazing work at very competitive prices. I bet he could just find you a head down there, prepare it and send it to you. If you read this article http://www.cardomain.com/ride/269576/15
you will see pictures of his work. I can connect you up with him.
He also designs his own cams and pistons etc for racing and turbo motors and is well known in the USA for his race motors.