I used Google over the weekend to find some pictures for our project. We just added the following 1986 Oregon SSP:
http://www.specialservicemustang.net...info208296.htm
...which has the same DSO as another car in our project that we suspected as being an Oregon SSP, but we were not 100% sure of the agency because of the pictures we had:
http://www.specialservicemustang.net...info208299.htm
So the newly found SSP confirms the agency for one we already had in the Project.