I reckon this is a great idea.
If they could make exactly the same machine, but using new technology, it would be a blast for those who want a BNIB machine that they played in their youth. I would put my hand up for a brand new 1978 Phoenix made by Williams. That title isnt as sought after as some of the other 70's/80's stuff, but the colours when new are magnificent. The only way these machines would get made, to keep the costs down is to get someone like Mike(homepin) on board with his excellent China/production connections.
Imagine getting a brand new in box 70's machine. That would be magnificent. !