If you want to save some $$ and not worried about it looking absolutely perfect, get yourself 2 quarts of brush on black Rustoleum. If worried about seeing brush strokes in the paint, brush it on first, then go over it with a sponge roller as they leave no brush marks.
Holds up 10x better than spray paints. Some may differ in opinions, but this is a low budget option or to put it another way, now you have more money to spend on more parts!
If you go this route, be sure to let it dry undisturbed for a good 24-36 hours. It takes this stuff a while to dry.