Yes, I have seen similar models at work. But really, I don't need that big a bench vice. I have two; one is small and fixed on a workbench by 4 screws, the other is portable and can be clamped to whatever table or bench. Neither of them is big enough to have an anvil surface.

Going through my TO DO list, one task requires me to visit a welding shop. So, I will ask them to cut for me a sheet of thick metal for the anvil.

I have settled for the light duty design made of a thick piece of metal (6x6 inches) fixed on thick wood. Half of this area is adequate for most jobs, but maybe some part of the surface is damaged somehow, I will still have more square inches of usable metal. Also, this bigger area allows working on bigger surfaces like a spade, if I need to flatten it.