Need Help! Universal Wanted

I am working on a project to motorize a small drive shaft that requires a differential axle style mechanism, the size you would expect on a go-cart etc.
Searched many ads, but they turn out to be solid axles.
Anyone know of something along available along these lines?


This is a companion discussion topic for the original entry at https://www.cnczone.com/forums/linear-and-rotary-motion/470648-universal-wanted-new-post.html