Here is the monoblock. It looks well machined and seems to fit well. He was having a new set of barrels made by someone who does that work. For some reason not explanationed to me, the barrel builder never completed them.

If I can't find a set of barrels, I could build a new set or get it done. I need to get the original set if he can find them. I would guess the ribs, forend lug, and and extractor would transfer to new set.