I'm in San Antonio for a few days, and I stopped by the Texas Highway Patrol Museum today, after learning of the '83-'84 DPS car sitting in the back lot there from Matt B. a few months ago. It is a confirmed '83, and the VIN is 6 away from mine. It was partially "restified" by the last owner, who donated it to the museum about 5 years ago, but is still pretty unmolested. The staff at the museum were great and allowed me to see the car up close, take pics, etc. I left my card reader at the house, but I'll post up some pics when I get back home.
Here is a link to their website:
http://www.thpa.org/