There are a few members here that have the police model Road Kings so maybe they will have a little additional insight to your questions. I have not heard of anyone changing out the controls and switch housings on the police models but I would not be surprised to discover that someone decided to do it. Some owners really want to get rid of the red buttons that are unique to the FLHP. To accomplish the change to chrome, you can use the "regular" Road King parts but will have to make some wiring changes since the FLHP has a few different buttons and toggles than civilian models. Another source for you to look at is Welcome to Retired Police Bikes. They have a tremendous amount of information and I bet someone on that forum has attempted the changes that you are asking about.