I wondered the same thing about photos. They forgot to mention that Crown Vics were also used in the pilot program. Here is one appears staged that I bet was used somewhere in the press:
A better shot of one of the Vics:
The article didn't mention the use of chrome pushbars (Buddy Bumper brand) or even the last little touch of stealth - dealer plate rims!
These are the only SMPV Diplomats I've ever seen:
If they made any in the multi-hue paint scheme, I'd love to see a photo.