There is a guy on another forum I frequent who is an engineer at Blue Print. According to him Blue Print now designs and builds their own heads due to issues they had with outside suppliers.
EDIT- A copy/paste of his comments:
"Just saw this post, was offline the last few days.
I could get someone here to talk more about our heads if you like, but the short version of the story is that we started making our own parts because of a variety of issues from suppliers - meeting order quantities, quality control, etc. BP puts a big warranty on their engines, so they can't have heads falling apart. Smithberg has worked with some of our castings now, testing CNC ports, he's had good things to say about the quality. Not being a cylinder head guy I can't really speak in great detail. But if you're asking if BP cares about their parts, the answer is an obvious yes because of the warranties they commit to, 50,000mi in some cases. They also work in other non-performance areas at what I'd consider an OEM level. I often wonder if some of these other budget manufacturers have an entire Quality department like Blueprint, they don't even allow parts out of quarrantine until they've passed a number of inspections, and they have people on the ground where parts are manufactured whether it's on our shores or not. From my vantage point it seems the right way to do business in today's economy."