Need to be more specific on which courier front end you want 86-95 or 96-98.
The 86-95 courier front end all you need is the grille, raider headlights if you want the flush headlights and the hood you can add to it to match up to the grille.
The 96-98 courier front end you will hood, grille, headlights, marker lights, core support, bumper and bumper ends.
86-95 front end
Stuff needed.
What the front end looks like with the raider headlights. If you don't do the raider headlights you just keep the stock mazda ones.
96-98 front end