Pretty sure you can get away with a good flat (satin) black paint (even though this pic is of a reproduction panel). As far as the red for the upper and lower portions, there is an outfit called Totally Auto that is owned by Dave Fiero that has the correct paint.
Some careful masking and you should be good to go. Laysons even states to carry the trunk finish emblem (though it looks a little wavy with the chrome on the 'S' in the pic.