The Superboard has a 1" grid that helps me with layout, especially when I can see through the fabric even slightly. I don't have to measure from the selvage or fold, I just line up my fabric to make sure it's square with the grid and then I can match my grain line arrow up with the nearest grid line and pin in place.
Can you buy them new? Of course. Nowadays, you'll be looking for a brand like Black and Decker, Sears, Dritz, or even Simplicity. They all seem to have overly large handles and strange levers as if more is better. I don't care for them, personally. I like to keep it small and simple.
In your search you may come across rotary electric shears or knifes. These are professional cutting tools for cutting many layers of fabric. They don't work so well with only only one or two layers.
I will say that it does take a little getting used to. At first it will feel awkward, and you'll go too slowly, and you won't know that a short horizontal glide will easily cut your notches for you, but after a while you'll get the hang of it and will never want to go back to cutting with scissors.
Now you know how I get my work done and stay (mostly) efficient! Happy Cutting!