He does have a website but I can't remember the address....doesn't matter as it's been under construction for 5 years.
Call the number, leave a message and tell him Plumcrazy and Tony sent you. He'll call back, if he doesn't call back right away it's only because he's working on a set of heads, or several.
Edit: I remembered, it's
Greg Good Racing - Coming Soon
Email is also a good way to contact him, it's on his site.