Hi Michelle, here is a post with directions on how to build one. Hope it helps. https://www.hometalk.com/41998060/how-to-build-barn-doors
Here is how we did it: https://thehoneycombhome.com/how-to-build-a-sliding-barn-door-for-less/
Hi Michelle, you can buy the hardware at any home store or online from Amazon or wayfair, etc. You can buy a door or build one!
This idea is pretty cool