N Scale roots - cast resin vehicles" is OK for my 70's-82 era but I needed something more modern for the later eras.
I discovered a new line of 3D printed vehicle model kits from Royale Models. I ordered this fuel tanker with trailer kit from their web site www.royalemodels.com. These kits come in a package like the one shown in this photo.
These are excellent models and in my limited experience with 3D printed models represent the best available in that medium.