Plastic pieces for headlight aiming?

[Tomguy]

Alright, I've tried some ways to get around this - glue, tape, etc... but I can't seem to.

The plastic pieces for aiming my headlights (the pieces that hold the aiming screws in the headlamp surround) are cracked (fortunatley, not all of them, but enough of them).

Where (if anywhere?) can I pick up more of these? Would the dealership have any (or order them)?