I would say X2 might be able to get it to you cheapest off of a wreck. New, those colored panels can be pretty expensive. If the dealership can’t order it (but you want it new) I bet Jon at partsrack probably can get it. Especially with the new merger.
If you haven’t found your piece yet, you can try any color, order an aerosol can of dye from one of the two companies that specialize in it (google). They will custom match your color if necessary.