http://www.ebay.com/itm/NICE-CERTIFI...item337ce94a98
Not an actual radar unit used by CHP, but this exact model was used by the CHP in the early 90s to early 2000's(and possibly more recent). 1998-2000 Crown Victoria CHP Wiring Schematics do show this radar setup.
One of Michaels (mac88chp) photos for reference. 1990 Mustang.
Multiple other units like this on ebay as well.