I'm not sure they even make them anymore, but I did the raised detail on an old AMT Bird of Prey using a paint pen. Don't press too hard, but it lets you get decent coverage on the raised detail without bleeding paint over the base color. It came out very well.
As someone already mentioned, dry brushing is next best. My alternative now is light strokes with a fine brush with very little paint on it; not quite drybrushing, but oh so close.
Doug