So they’re selling a reproduction board, that does not actually work with original hardware, for over $200 a pop? That’s some expensive wall-art.
Well, if you were to populate it with the chips from your old board, it would work. So as a replacement part if it was just your PCB that was cooked, it's not a terrible option. Just having the option to get such a brand-new ancient part is still valuable, regardless of cost.
On the bright side, I could spend $500 more on Mac Pro wheels.
And their site also states "These boards use the original bill of materials, follow the original schematics, and can be used to replace damaged original boards by using the original parts from these boards."