Hi Jim......I made a turntable for a 1/24 scale car (Ferrari). I purchased a 1 rpm motor from Princess Auto. I secured it into a piece of wood, and used an axle and wheel assembly out of my 8 yr olds' broken RC truck. I secured the wheel into a piece of stryofoam which I cut to size for the car, and covered with a piece of metallic (shiny) paper. I wired it directly in the wall with an old extension cord spliced onto the motor. I will post pics maybe tomorrow!!!
I don't know if it will work for your size, but it worked perfectly for mine.
Sammy