How do I find a complete rear center console for 2015 Lincoln Navigator

Try all your local salvage yards and auto parts dismantlers. Keep checking with them because cars come and go fast. If you can't find one in your color, you CAN paint them easily. Duplicolor, Eastwood, and SEM all make excellent vinyl and plastic trim paint, you can also use adhesion promoter for a good finish. I've repainted interior trim with excellent results, looks like it came from the factory.