Thanks Dave.The part number for your guage is F0W-6820A-00-00. Fits 01 to 05 years.
Babbittsonline still lists them at $784.99. I did some searching but found no used units. Found 2 new on eBay one at new price. And one 30% above new. Unless you can find someone parting one out you'll probably have to go new unfortunately.