Id seriously take him up on it if it was me... figure something out for a week if you are dead set on a nice set of tinted lights and don't want the silver trim. Because whatever you do to black it out is not going to be close to as good as OEM.
2000 Mustang GT Steeda build #48. Bolt ons, suspension, Novi 2000.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.