Not a true SSP but Marion County uses a few Mustangs for I-5 duty around Salem area. These had yellow and brown stripes on side and were slick tops -can see 'E' plate marks on rear shot. Used unmarked maroon, black and silver cars but most white ones were marked. Have seen them using a silver and red 2011 or 2012 5.0's now. IIRC Tom Vigil has pics of them in service.
http://cgi.ebay.com/ebaymotors/Ford-...item3cc01a4179