£50 on ebay for a black plastic badgeless grill. comes with mesh. needs painting but u might get away with just lacquer on a black car.
make a hanger out of wire for holding/drying
allowing it to be dry before spraying, be sparse with each coat (as little paint as you can get on) and 15 mins in between drying.
wet n dry, wet cloth to wipe then primer x 2 coats. paint x 3 coats then as many coats of lacquer as u have time for. then once its hard (2 days). get polish on it and make it all smooth. then fit the grill. it may take time but it will look like its meant to be there!