These are available through many outlets, I’m sure. I get mine from Michael’s. They are pretty cheap, sturdy, and display chips wonderfully!
These are still available in some areas. I’ve seen them on Amazon, I think. I haven’t looked in a long time. Mounted to the wall here in this photo. I bought it from a member here who sold it. It’s an awesome display. Nice to look at and very sturdy given it’s holding 108 chips!