Actually, the references to the mirrors had to do with the AMT kits, not the real/1:1 trucks.
The turbine tractors, to the best of my research, were never available to fleets or purchasers, there were only a few built and they were all owned by, operated by, and tested by GM. None were sold, as far as indicated by any written info I've found. It was an experimental program, but GM discovered the turbines could not generate enough fuel economy to be more cost effective than the common diesel engines, so the experiment was shelved.