From what he tells me, the guy that Top Hat used to use has moved to NC. As it is right now they dont have a good shop to do it. The shop they are using right this second kinda just dremels and port matches.
I believe the head you are talking about was made by the previous guy before he moved.
Mike did give me some info on an overseas shop they use for serious head work, however as I said now I am just collecting info.
-Sayajin