Has anyone built a cnc router table using the 1500mm Cbeam?

I teach at a public high school and hopefully getting the money to build one of these.
If anyone has any plans for this cnc router table let me know.
The 1500mm is out of stock does anyone know where to get it?
Also any input of v slot vs c beam which is better?
I see there is 1500mm available in v slot but not c beam.