A month and a half ago I was watching the Aussie ones getting machined. They are CNC machined just outside Melbourne...and going strong (they had pallets and pallets of them around)
I will have to double check the brand name they are sold under here, they didn't have any of them around boxed, just the finished machined ones stacked up

I do know they where not cast in the same spot as they where machined, I can't remember what state they where getting cast in, QLD I think