Jake, welcome to the forum!
The Nebraska SSPs turn up on occassion, but in terms of the agency I don't think a great deal of information is known about them. Use the search function here to read all you can about Nebraska cars.
If you would, please post up some pictures of your VIN label on the driver's door, and if possible a clear picture of your buck tags. If you have to, you can tape a piece of paper over them, do a rubbing, and take a picture of that. We can then add your car to our VIN Project.