I saw a Zephyr 6 disc with Nav on ebay (current bid was around $200). If you could paint the face to match the Fusion interior, that would look awesome. I emailed the seller asking for the dimensions but got no response. There will probably be more available in the months ahead as people buy more, crash more, or just replace the stock unit.
There's also a center dash piece from a Zephyr for sale on ebay. It mentions a kick mark "made by someone who was getting beat up by a maffia guy"- or something like that. I wondered if there was any blood splatter to go with it