OEM, the painted/CF ones look too ricey. If yours has faded, restore it up using something like Black Wow. Black Wow will make it look dark black again with some sheen
This part is crazy to find cheap.. It's definately the first piece to break too or to me its been. Sun bakes it and the slightest nudge cracks it good. Junkyards arn't the best places for this piece since all the wrecked ones will be missing it as well. Maybe MPS autosalvage has some since they have tons of stangs, otherwise to go back to stock its gonna be pricey.