as you probably know most any component on the motor such as starter, mechanical fuel pump, etc. will be easier to replace while the engine is on the bench.
My dog when I had one would stay in the yard unless lured out with hotdogs etc. He was very territorial and spent most of his time in the yard or the car. LOL
back to the topic. why do you want one. gonna take up modern art on the garage door.
My 2001 gmc still has the original spare, never been on the ground. If I have a flat it's usually a nail or screw that creates a slow leak which i find , plug, pump up the tire and continue.