I still have a few parts in my garage from the 04 gt that someone may need.
Prices are plus shipping.

-40th anniversary emblems (brand new) $50
-99-04 rear tail light harnesses (won't fit 99/01 cobra) $10
-Fuel rail adapter (lets you install fuel pressure gauge if there is no scrader valve on your stock GT fuel rail) $25
-mach 1 style tail light decal kit for any 99-04 (attached is a pic of them on my 04. I had 2 sets and I have the extra set here left for sale) $25