Carlton has created a series of POLITE shirts and jackets that can be purchased on Spreadshirt, which is a European version of Cafe Press. The black jacket shown above is a thin polyester training jacket with cotton liner. He's also made a long sleeve t-shirt available with "POLITE" on the back and "ONE LESS CAR" on the front.
I often ride a plain black bike equipped with a rear rack and rack trunk that looks just like a police bike. When I wear black pants, black shoes and a black jacket, I've heard pedestrians make remarks about "%*#! pigs on bikes" as a ride by.
Learn more at Quickrelease.TV. Spreadshirt, unfortunately, does not ship outside of Europe. Given that the US Dollar has lost 40% of its value against the UK pound and Euro this year, Americans can't afford anything from Europe anyway.