Help me find this sliding closet door hardware piece?

I have an older sliding close door, two panels. The panels hang on a roller system with tracks at the top of the doors. However, they also have a groove in bottom of the panels that sits within a metal floor frame to guide the doors when opening/closing and prevent them from swinging.

I tried 3d printing the piece, but the plastic is simply not sturdy enough and snaps off.

I’ve included a photo of the 3D printed piece below, it’s held in place by two screws that are drilled through into the floor metal rack holder.

I cannot find this particular hardware piece anywhere online or in big box home improvement stores. Any ideas?

https://preview.redd.it/gtrharnsge641.jpg?width=1057&format=pjpg&auto=webp&s=1740e71cbb5d8fc3c8600eb45c751b6867e9159a