I have a 2000, F-150, XLT and am thinking of trading up to a 2002 model. I would really like to have the exterior Key Pad on the drivers door to unlock. I have a Explorer with this feature and I love it. I know the Lariat comes with this as standard, but I want a XLT. Anyone know what the cost might be to have one installed on a XLT ?? This is my 3rd. new style F-150 and I love them