For the magnetic options, there are several paths. If you want to print your own base, you can purchase this for around $50: Amazon.com: Magnetic Levitation Machine
But it just looked like a more work than spending ten dollar more for a finished version.
So for $60, I was able to get this which has the look for a CT display. And it comes with a 2.5 inch puck like magnet that the CT model can just be placed on. I may hot glue it so when power is lost, the truck doesn't fall off. And also the magnet doesn't slam on to the base.